var Spry;

if (!Spry) Spry = {};

Spry.forwards = 1; // const
Spry.backwards = 2; // const

Spry.linearTransition = 1; // const
Spry.sinusoidalTransition = 2; // const

if (!Spry.Effect) Spry.Effect = {};

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.Registry
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.Registry = function()
{
	this.elements = new Array();

	_AnimatedElement = function (element) 
	{
		this.element = element;
		this.currentEffect = -1;
		this.effectArray = new Array();
	};
	
	this.AnimatedElement = _AnimatedElement;

};
 
Spry.Effect.Registry.prototype.getRegisteredEffect = function(element, effect) 
{
	var eleIdx = this.getIndexOfElement(element);

	if (eleIdx == -1)
	{
		this.elements[this.elements.length] = new this.AnimatedElement(element);
		eleIdx = this.elements.length - 1;
	}

	var foundEffectArrayIdx = -1;
	for (var i = 0; i < this.elements[eleIdx].effectArray.length; i++) 
	{
		if (this.elements[eleIdx].effectArray[i])
		{
			if (this.effectsAreTheSame(this.elements[eleIdx].effectArray[i], effect))
			{
				foundEffectArrayIdx = i;
				//this.elements[eleIdx].effectArray[i].reset();
				if (this.elements[eleIdx].effectArray[i].isRunning == true) {
					//Spry.Debug.trace('isRunning == true');
					this.elements[eleIdx].effectArray[i].cancel();
				}
				this.elements[eleIdx].currentEffect = i;
				if (this.elements[eleIdx].effectArray[i].options && (this.elements[eleIdx].effectArray[i].options.toggle != null)) {
					if (this.elements[eleIdx].effectArray[i].options.toggle == true)
						this.elements[eleIdx].effectArray[i].doToggle();
				} else { // same effect name (but no options or options.toggle field)
					this.elements[eleIdx].effectArray[i] = effect;
				}

				break;
			}
		}
	}

	if (foundEffectArrayIdx == -1) 
	{
		var currEffectIdx = this.elements[eleIdx].effectArray.length;
		this.elements[eleIdx].effectArray[currEffectIdx] = effect;
		this.elements[eleIdx].currentEffect = currEffectIdx;
	}

	var idx = this.elements[eleIdx].currentEffect;
	return this.elements[eleIdx].effectArray[idx];
}

Spry.Effect.Registry.prototype.getIndexOfElement = function(element)
{
	var registryIndex = -1;
	for (var i = 0; i < this.elements.length; i++)
	{
		if (this.elements[i]) {
			if (this.elements[i].element == element)
				registryIndex = i;
		}
	}
	return registryIndex;
}

Spry.Effect.Registry.prototype.effectsAreTheSame = function(effectA, effectB)
{
	if (effectA.name != effectB.name) 
		return false;

	if(effectA.effectsArray) // cluster effect
	{
		if (!effectB.effectsArray || effectA.effectsArray.length != effectB.effectsArray.length)
			return false;

		for (var i = 0; i < effectA.effectsArray.length; i++)
		{
			if(!Spry.Effect.Utils.optionsAreIdentical(effectA.effectsArray[i].effect.options, effectB.effectsArray[i].effect.options))
				return false;
		}
	}
	else // single effect
	{
		if(effectB.effectsArray || !Spry.Effect.Utils.optionsAreIdentical(effectA.options, effectB.options))
			return false;
	}

	return true;
}

var SpryRegistry = new Spry.Effect.Registry;

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.Utils
//
//////////////////////////////////////////////////////////////////////

if (!Spry.Effect.Utils) Spry.Effect.Utils = {};

Spry.Effect.Utils.showError = function(msg)
{
	alert('Spry.Effect ERR: ' + msg);
}

Spry.Effect.Utils.Position = function()
{
	this.x = 0; // left
	this.y = 0; // top
	this.units = "px";
}

Spry.Effect.Utils.Rectangle = function()
{
	this.width = 0;
	this.height = 0;
	this.units = "px";
}

Spry.Effect.Utils.PositionedRectangle = function()
{
	this.position = new Spry.Effect.Utils.Position;
	this.rectangle = new Spry.Effect.Utils.Rectangle;
}

Spry.Effect.Utils.intToHex = function(integerNum) 
{
	var result = integerNum.toString(16);
	if (result.length == 1) 
		result = "0" + result;
	return result;
}

Spry.Effect.Utils.hexToInt = function(hexStr) 
{
	return parseInt(hexStr, 16); 
}

Spry.Effect.Utils.rgb = function(redInt, greenInt, blueInt) 
{
	
	var redHex = Spry.Effect.Utils.intToHex(redInt);
	var greenHex = Spry.Effect.Utils.intToHex(greenInt);
	var blueHex = Spry.Effect.Utils.intToHex(blueInt);
	compositeColorHex = redHex.concat(greenHex, blueHex);
	compositeColorHex = '#' + compositeColorHex;
	return compositeColorHex;
}

Spry.Effect.Utils.camelize = function(stringToCamelize)
{
    var oStringList = stringToCamelize.split('-');
	var isFirstEntry = true;
	var camelizedString = '';

	for(var i=0; i < oStringList.length; i++)
	{
		if(oStringList[i].length>0)
		{
			if(isFirstEntry)
			{
				camelizedString = oStringList[i];
				isFirstEntry = false;
			}
			else
			{
				var s = oStringList[i];
      			camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
			}
		}
	}

	return camelizedString;
}

Spry.Effect.Utils.isPercentValue = function(value) 
{
	var result = false;
	try
	{
		if (value.lastIndexOf("%") > 0)
			result = true;
	}
	catch (e) {}
	return result;
}

Spry.Effect.Utils.getPercentValue = function(value) 
{
	var result = 0;
	try
	{
		result = Number(value.substring(0, value.lastIndexOf("%")));
	}
	catch (e) {Spry.Effect.Utils.showError('Spry.Effect.Utils.getPercentValue: ' + e);}
	return result;
}

Spry.Effect.Utils.getPixelValue = function(value) 
{
	var result = 0;
	try
	{
		result = Number(value.substring(0, value.lastIndexOf("px")));
	}
	catch (e) {}
	return result;
}

Spry.Effect.Utils.getFirstChildElement = function(node)
{
	if (node)
	{
		var childCurr = node.firstChild;

		while (childCurr)
		{
			if (childCurr.nodeType == 1) // Node.ELEMENT_NODE
				return childCurr;

			childCurr = childCurr.nextSibling;
		}
	}

	return null;
};

Spry.Effect.Utils.fetchChildImages = function(startEltIn, targetImagesOut)
{
	if(!startEltIn  || startEltIn.nodeType != 1 || !targetImagesOut)
		return;

	if(startEltIn.hasChildNodes())
	{
		var childImages = startEltIn.getElementsByTagName('img')
		var imageCnt = childImages.length;
		for(var i=0; i<imageCnt; i++)
		{
			var imgCurr = childImages[i];
			var dimensionsCurr = Spry.Effect.getDimensions(imgCurr);
			targetImagesOut.push([imgCurr,dimensionsCurr.width,dimensionsCurr.height]);
		}
	}
}

Spry.Effect.Utils.optionsAreIdentical = function(optionsA, optionsB)
{
	if(optionsA == null && optionsB == null)
		return true;

	if(optionsA != null && optionsB != null)
	{
		var objectCountA = 0;
		var objectCountB = 0;

		for (var propA in optionsA) objectCountA++;
		for (var propB in optionsB) objectCountB++;

		if(objectCountA != objectCountB)
			return false;

		for (var prop in optionsA)
		{
			if (optionsA[prop] === undefined)
			{
				if(optionsB[prop] !== undefined)
					return false;
			}
			else if((optionsB[prop] === undefined) || (optionsA[prop] != optionsB[prop]))
			{
				return false;
			}
		}

		return true;
	}

	return false;
}

//////////////////////////////////////////////////////////////////////
//
// DHTML manipulation
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.getElement = function(ele)
{
	var element = null;
	if (ele && typeof ele == "string")
		element = document.getElementById(ele);
	else
		element = ele;
	if (element == null) Spry.Effect.Utils.showError('Element "' + ele + '" not found.');
	return element;
	
}

Spry.Effect.getStyleProp = function(element, prop)
{
	var value;

	try
	{
		value = element.style[Spry.Effect.Utils.camelize(prop)];
		if (!value)
		{
		    // Removed because call of 'getComputedStyle' causes problems
		    // on safari and opera (mac only). The function returns the
		    // correct value but it seems that there occurs a timing issue.

			if (document.defaultView && document.defaultView.getComputedStyle) {
				var css = document.defaultView.getComputedStyle(element, null);
				value = css ? css.getPropertyValue(prop) : null;
			} else
				if (element.currentStyle) {
					value = element.currentStyle[Spry.Effect.Utils.camelize(prop)];
				}
		}
	}
	catch (e) {Spry.Effect.Utils.showError('Spry.Effect.getStyleProp: ' + e);}

	return value == 'auto' ? null : value;
};

Spry.Effect.getStylePropRegardlessOfDisplayState = function(element, prop, displayElement)
{
	var refElement = displayElement ? displayElement : element;
	var displayOrig = Spry.Effect.getStyleProp(refElement, 'display');
	var visibilityOrig = Spry.Effect.getStyleProp(refElement, 'visibility');

	if(displayOrig == 'none')
	{
		Spry.Effect.setStyleProp(refElement, 'visibility', 'hidden');
		Spry.Effect.setStyleProp(refElement, 'display', 'block');
	
		if(window.opera) // opera needs focus to calculate the size for hidden elements
			refElement.focus();
	}

	var styleProp = Spry.Effect.getStyleProp(element, prop);

	if(displayOrig == 'none') // reset the original values
	{
		Spry.Effect.setStyleProp(refElement, 'display', 'none');
		Spry.Effect.setStyleProp(refElement, 'visibility', visibilityOrig);
	}

	return styleProp;
};

Spry.Effect.setStyleProp = function(element, prop, value)
{
	try
	{
		element.style[Spry.Effect.Utils.camelize(prop)] = value;
	}
	catch (e) {Spry.Effect.Utils.showError('Spry.Effect.setStyleProp: ' + e);}

	return null;
};

Spry.Effect.makePositioned = function(element)
{
	var pos = Spry.Effect.getStyleProp(element, 'position');
	if (!pos || pos == 'static') {
		element.style.position = 'relative';

		// Opera returns the offset relative to the positioning context, when an
		// element is position relative but top and left have not been defined
		if (window.opera) {
			element.style.top = 0;
			element.style.left = 0;
		}
	}
}

Spry.Effect.isInvisible = function(element)
{
	var propDisplay = Spry.Effect.getStyleProp(element, 'display');
	if (propDisplay && propDisplay.toLowerCase() == 'none')
		return true;

	var propVisible = Spry.Effect.getStyleProp(element, 'visibility');
	if (propVisible && propVisible.toLowerCase() == 'hidden')
		return true;

	return false;
}

Spry.Effect.enforceVisible = function(element)
{
	var propDisplay = Spry.Effect.getStyleProp(element, 'display');
	if (propDisplay && propDisplay.toLowerCase() == 'none')
		Spry.Effect.setStyleProp(element, 'display', 'block');

	var propVisible = Spry.Effect.getStyleProp(element, 'visibility');
	if (propVisible && propVisible.toLowerCase() == 'hidden')
		Spry.Effect.setStyleProp(element, 'visibility', 'visible');
}

Spry.Effect.makeClipping = function(element) 
{
	var overflow = Spry.Effect.getStyleProp(element, 'overflow');
	if (overflow != 'hidden' && overflow != 'scroll')
	{
		// IE 7 bug: set overflow property to hidden changes the element height to 0
		// -> therefore we save the height before changing the overflow property and set the old size back
		var heightCache = 0;
		var needsCache = /MSIE 7.0/.test(navigator.userAgent) && /Windows NT/.test(navigator.userAgent);
		if(needsCache)
			heightCache = Spry.Effect.getDimensionsRegardlessOfDisplayState(element).height;

		Spry.Effect.setStyleProp(element, 'overflow', 'hidden');

		if(needsCache)
			Spry.Effect.setStyleProp(element, 'height', heightCache+'px');
	}
}

Spry.Effect.cleanWhitespace = function(element) 
{
	var childCountInit = element.childNodes.length;
    for (var i = childCountInit - 1; i >= 0; i--) {
      var node = element.childNodes[i];
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
	  {
		  try
		  {
		 	element.removeChild(node);
		  }
		  catch (e) {Spry.Effect.Utils.showError('Spry.Effect.cleanWhitespace: ' + e);}
	  }
    }
}

Spry.Effect.getComputedStyle = function(element)
{
	var computedStyle = /MSIE/.test(navigator.userAgent) ? element.currentStyle : document.defaultView.getComputedStyle(element, null);
	return computedStyle;
}

Spry.Effect.getDimensions = function(element)
{
	var dimensions = new Spry.Effect.Utils.Rectangle;
	var computedStyle = null;

	if (element.style.width && /px/i.test(element.style.width))
	{
		dimensions.width = parseInt(element.style.width); // without padding
	}
	else
	{
		computedStyle = Spry.Effect.getComputedStyle(element);
		var tryComputedStyle = computedStyle && computedStyle.width && /px/i.test(computedStyle.width);

		if (tryComputedStyle)
			dimensions.width = parseInt(computedStyle.width); // without padding, includes css

		if (!tryComputedStyle || dimensions.width == 0) // otherwise we might run into problems on safari and opera (mac only)
			dimensions.width = element.offsetWidth;   // includes padding
	}

	if (element.style.height && /px/i.test(element.style.height))
	{
		dimensions.height = parseInt(element.style.height); // without padding
	}
	else
	{
		if (!computedStyle)
			computedStyle = Spry.Effect.getComputedStyle(element);

        var tryComputedStyle = computedStyle && computedStyle.height && /px/i.test(computedStyle.height);

		if (tryComputedStyle)
			dimensions.height = parseInt(computedStyle.height); // without padding, includes css

		if(!tryComputedStyle || dimensions.height == 0) // otherwise we might run into problems on safari and opera (mac only)
			dimensions.height = element.offsetHeight;   // includes padding
	}

	return dimensions;
}

Spry.Effect.getDimensionsRegardlessOfDisplayState = function(element, displayElement)
{
	// If the displayElement display property is set to 'none', we temporarily set its
	// visibility state to 'hidden' to be able to calculate the dimension.

	var refElement = displayElement ? displayElement : element;
	var displayOrig = Spry.Effect.getStyleProp(refElement, 'display');
	var visibilityOrig = Spry.Effect.getStyleProp(refElement, 'visibility');

	if(displayOrig == 'none')
	{
		Spry.Effect.setStyleProp(refElement, 'visibility', 'hidden');
		Spry.Effect.setStyleProp(refElement, 'display', 'block');

		if(window.opera) // opera needs focus to calculate the size for hidden elements
			refElement.focus();
	}

	var dimensions = Spry.Effect.getDimensions(element);

	if(displayOrig == 'none') // reset the original values
	{
		Spry.Effect.setStyleProp(refElement, 'display', 'none');
		Spry.Effect.setStyleProp(refElement, 'visibility', visibilityOrig);
	}

	return dimensions;
}

Spry.Effect.getOpacity = function(element)
{
  var o = Spry.Effect.getStyleProp(element, "opacity");
  if (o == undefined || o == null)
    o = 1.0;
  return o;
}

Spry.Effect.getColor = function(element)
{
  var c = Spry.Effect.getStyleProp(ele, "background-color");
  return c;
}

Spry.Effect.getPosition = function(element)
{
	var position = new Spry.Effect.Utils.Position;
	var computedStyle = null;

	if (element.style.left  && /px/i.test(element.style.left))
	{
		position.x = parseInt(element.style.left); // without padding
	}
	else
	{
		computedStyle = Spry.Effect.getComputedStyle(element);
		var tryComputedStyle = computedStyle && computedStyle.left && /px/i.test(computedStyle.left);

		if (tryComputedStyle)
			position.x = parseInt(computedStyle.left); // without padding, includes css

		if(!tryComputedStyle || position.x == 0) // otherwise we might run into problems on safari and opera (mac only)
			position.x = element.offsetLeft;   // includes padding
	}

	if (element.style.top && /px/i.test(element.style.top))
	{
		position.y = parseInt(element.style.top); // without padding
	}
	else
	{
		if (!computedStyle)
			computedStyle = Spry.Effect.getComputedStyle(element);

        var tryComputedStyle = computedStyle && computedStyle.top && /px/i.test(computedStyle.top);

		if (tryComputedStyle)
			position.y = parseInt(computedStyle.top); // without padding, includes css

		if(!tryComputedStyle || position.y == 0) // otherwise we might run into problems on safari and opera (mac only)
			position.y = element.offsetTop;   // includes padding
	}

	return position;
}

Spry.Effect.getOffsetPosition = Spry.Effect.getPosition; // deprecated

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.Animator
// (base class)
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.Animator = function(options)
{
	this.name = 'Animator';
	this.element = null;
	this.timer = null;
	this.direction = Spry.forwards;
	this.startMilliseconds = 0;
	this.repeat = 'none';
	this.isRunning = false;
	
	this.options = {
		duration: 500,
		toggle: false,
		transition: Spry.linearTransition,
		interval: 33 // ca. 30 fps
	};
	
	this.setOptions(options);

};

Spry.Effect.Animator.prototype.setOptions = function(options)
{
	if (!options)
		return;
	for (var prop in options)
		this.options[prop] = options[prop];
};

Spry.Effect.Animator.prototype.start = function(withoutTimer)
{
	if (arguments.length == 0)
		withoutTimer = false;
		
	var self = this;

	if (this.options.setup)
	{
		try
		{
			this.options.setup(this.element, this);
		}
		catch (e) {Spry.Effect.Utils.showError('Spry.Effect.Animator.prototype.start: setup callback: ' + e);}
	}
	
	this.prepareStart();

	var currDate = new Date();
	this.startMilliseconds = currDate.getTime();
	
	if (withoutTimer == false) {
		this.timer = setInterval(function() { self.drawEffect(); }, this.options.interval);
	}
	this.isRunning = true;

};

Spry.Effect.Animator.prototype.stop = function()
{
	if (this.timer) {
		clearInterval(this.timer);
		this.timer = null;
	}

	this.startMilliseconds = 0;

	if (this.options.finish)
	{
		try
		{
			this.options.finish(this.element, this);
		}
		catch (e) {Spry.Effect.Utils.showError('Spry.Effect.Animator.prototype.stop: finish callback: ' + e);}
	}
	this.isRunning = false;
	/*
	Spry.Debug.trace('after stop:' + this.name);
	Spry.Debug.trace('this.element.style.top: ' + this.element.style.top);
	Spry.Debug.trace('this.element.style.left: ' + this.element.style.left);
	Spry.Debug.trace('this.element.style.width: ' + this.element.style.width);
	Spry.Debug.trace('this.element.style.height: ' + this.element.style.height);
	*/
};

Spry.Effect.Animator.prototype.cancel = function()
{
	if (this.timer) {
		clearInterval(this.timer);
		this.timer = null;
	}
	this.isRunning = false;
}

Spry.Effect.Animator.prototype.drawEffect = function()
{
	var isRunning = true;

	var position = this.getElapsedMilliseconds() / this.options.duration;
	if (this.getElapsedMilliseconds() > this.options.duration) {
		position = 1.0;
	} else {
		if (this.options.transition == Spry.sinusoidalTransition)
		{
			position = (-Math.cos(position*Math.PI)/2) + 0.5;
		}
		else if (this.options.transition == Spry.linearTransition)
		{
			// default: linear
		}
		else
		{
			Spry.Effect.Utils.showError('unknown transition');
		}
		
	}
	//Spry.Debug.trace('position: ' + position + ' : ' + this.name + '(duration: ' + this.options.duration + 'elapsed: ' + this.getElapsedMilliseconds() + 'test: ' + this.startMilliseconds);
	this.animate(position);
	
	if (this.getElapsedMilliseconds() > this.options.duration) {
		this.stop();
		isRunning = false;
	}
	return isRunning;

};

Spry.Effect.Animator.prototype.getElapsedMilliseconds = function()
{
	if (this.startMilliseconds > 0) {
		var currDate = new Date();
		return (currDate.getTime() - this.startMilliseconds);
	} else {
		return 0;
	}
};

Spry.Effect.Animator.prototype.doToggle = function()
{
	if (this.options.toggle == true) {
		if (this.direction == Spry.forwards) {
			this.direction = Spry.backwards;
		} else if (this.direction == Spry.backwards) {
			this.direction = Spry.forwards;
		}
	}
}

Spry.Effect.Animator.prototype.prepareStart = function() {};

Spry.Effect.Animator.prototype.animate = function(position) {};

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.Move
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.Move = function(element, fromPos, toPos, options)
{
	this.dynamicFromPos = false;
	if (arguments.length == 3)
	{
		options = toPos;
		toPos = fromPos;
		fromPos = Spry.Effect.getPosition(element);
		this.dynamicFromPos = true;
	}

	Spry.Effect.Animator.call(this, options);
	
	this.name = 'Move';
	this.element = Spry.Effect.getElement(element);
	
	if (fromPos.units != toPos.units)
		Spry.Effect.Utils.showError('Spry.Effect.Move: Conflicting units (' + fromPos.units + ', ' + toPos.units + ')');

	this.units = fromPos.units;
	this.startX = fromPos.x;
	this.stopX = toPos.x;
	this.startY = fromPos.y;
	this.stopY = toPos.y;
	
	this.rangeMoveX = this.startX - this.stopX;
	this.rangeMoveY= this.startY - this.stopY;
	
};

Spry.Effect.Move.prototype = new Spry.Effect.Animator();
Spry.Effect.Move.prototype.constructor = Spry.Effect.Move;

Spry.Effect.Move.prototype.animate = function(position)
{
	var left = 0;
	var top = 0;
	
	if (this.direction == Spry.forwards) {
		left = this.startX - (this.rangeMoveX * position);
		top = this.startY - (this.rangeMoveY * position);
	} else if (this.direction == Spry.backwards) {
		left = this.rangeMoveX * position + this.stopX;
		top = this.rangeMoveY * position + this.stopY;
	}
	
	this.element.style.left = left + this.units;
	this.element.style.top = top + this.units;
};

Spry.Effect.Move.prototype.prepareStart = function() 
{
	if (this.dynamicFromPos == true)
	{
		var fromPos = Spry.Effect.getPosition(this.element);
		this.startX = fromPos.x;
		this.startY = fromPos.y;
		
		this.rangeMoveX = this.startX - this.stopX;
		this.rangeMoveY= this.startY - this.stopY;
	}
};

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.MoveSlide
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.MoveSlide = function(element, fromPos, toPos, horizontal, options)
{
	this.dynamicFromPos = false;
	if (arguments.length == 4)
	{
		options = horizontal;
		horizontal = toPos;
		toPos = fromPos;
		fromPos = Spry.Effect.getPosition(element);
		this.dynamicFromPos = true;
	}
	
	Spry.Effect.Animator.call(this, options);
	
	this.name = 'MoveSlide';
	this.element = Spry.Effect.getElement(element);
	this.horizontal = horizontal;
	this.firstChildElement = Spry.Effect.Utils.getFirstChildElement(element);
	this.overflow = Spry.Effect.getStyleProp(this.element, 'overflow');
	this.originalChildRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(this.firstChildElement, this.element);

	if (fromPos.units != toPos.units)
		Spry.Effect.Utils.showError('Spry.Effect.MoveSlide: Conflicting units (' + fromPos.units + ', ' + toPos.units + ')');
		
	this.units = fromPos.units;

	var originalRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);
	this.startHeight = originalRect.height;

	this.startX = Number(fromPos.x);
	this.stopX = Number(toPos.x);
	this.startY = Number(fromPos.y);
	this.stopY = Number(toPos.y);

	this.rangeMoveX = this.startX - this.stopX;
	this.rangeMoveY = this.startY - this.stopY;

	this.enforceVisible = Spry.Effect.isInvisible(this.element);
};

Spry.Effect.MoveSlide.prototype = new Spry.Effect.Animator();
Spry.Effect.MoveSlide.prototype.constructor = Spry.Effect.MoveSlide;

Spry.Effect.MoveSlide.prototype.animate = function(position)
{
    if(this.horizontal)
    {
	    var xStart      = (this.direction == Spry.forwards) ? this.startX : this.stopX;
	    var xStop       = (this.direction == Spry.forwards) ? this.stopX : this.startX;
	    var eltWidth    = xStart + position * (xStop - xStart);

	    if(eltWidth<0) eltWidth = 0;

	    if(this.overflow != 'scroll' || eltWidth > this.originalChildRect.width)
		    this.firstChildElement.style.left = eltWidth - this.originalChildRect.width + this.units;

	    this.element.style.width = eltWidth + this.units;
    }
    else
    {
		var yStart      = (this.direction == Spry.forwards) ? this.startY : this.stopY;
		var yStop       = (this.direction == Spry.forwards) ? this.stopY : this.startY;
		var eltHeight   = yStart + position * (yStop - yStart);
	
		if(eltHeight<0) eltHeight = 0;
	
		if(this.overflow != 'scroll' || eltHeight > this.originalChildRect.height)
			this.firstChildElement.style.top = eltHeight - this.originalChildRect.height + this.units;

		this.element.style.height = eltHeight + this.units;
	}
	
	if(this.enforceVisible)
	{
		Spry.Effect.enforceVisible(this.element);
		this.enforceVisible = false;
	}
};

Spry.Effect.MoveSlide.prototype.prepareStart = function() 
{
	if (this.dynamicFromPos == true)
	{
		var fromPos = Spry.Effect.getPosition(this.element);
		this.startX = fromPos.x;
		this.startY = fromPos.y;
		
		this.rangeMoveX = this.startX - this.stopX;
		this.rangeMoveY= this.startY - this.stopY;
	}
};

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.Size
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.Size = function(element, fromRect, toRect, options)
{
	this.dynamicFromRect = false;
	if (arguments.length == 3)
	{
		options = toRect;
		toRect = fromRect;
		fromRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);
		this.dynamicFromRect = true;
	}
	
	Spry.Effect.Animator.call(this, options);
	
	this.name = 'Size';
	this.element = Spry.Effect.getElement(element);

	if (fromRect.units != toRect.units)
		Spry.Effect.Utils.showError('Spry.Effect.Size: Conflicting units (' + fromRect.units + ', ' + toRect.units + ')');
		
	this.units = fromRect.units;

	var originalRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);
	this.originalWidth = originalRect.width;

	this.startWidth = fromRect.width;
	this.startHeight = fromRect.height;
	this.stopWidth = toRect.width;
	this.stopHeight = toRect.height;
	this.childImages = new Array();

	if(this.options.scaleContent)
		Spry.Effect.Utils.fetchChildImages(element, this.childImages);

	this.fontFactor = 1.0;
	if(this.element.style && this.element.style.fontSize)
	{
		if(/em\s*$/.test(this.element.style.fontSize))
			this.fontFactor = parseFloat(this.element.style.fontSize);
	}

	if (Spry.Effect.Utils.isPercentValue(this.startWidth))
	{
		var startWidthPercent = Spry.Effect.Utils.getPercentValue(this.startWidth);
		//var originalRect = Spry.Effect.getDimensions(element);
		this.startWidth = originalRect.width * (startWidthPercent / 100);
	}

	if (Spry.Effect.Utils.isPercentValue(this.startHeight))
	{
		var startHeightPercent = Spry.Effect.Utils.getPercentValue(this.startHeight);
		//var originalRect = Spry.Effect.getDimensions(element);
		this.startHeight = originalRect.height * (startHeightPercent / 100);
	}

	if (Spry.Effect.Utils.isPercentValue(this.stopWidth))
	{
		var stopWidthPercent = Spry.Effect.Utils.getPercentValue(this.stopWidth);
		var originalRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);
		this.stopWidth = originalRect.width * (stopWidthPercent / 100);
	}

	if (Spry.Effect.Utils.isPercentValue(this.stopHeight))
	{
		var stopHeightPercent = Spry.Effect.Utils.getPercentValue(this.stopHeight);
		var originalRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);
		this.stopHeight = originalRect.height * (stopHeightPercent / 100);
	}

	this.widthRange = this.startWidth - this.stopWidth;
	this.heightRange = this.startHeight - this.stopHeight;

	this.enforceVisible = Spry.Effect.isInvisible(this.element);
};

Spry.Effect.Size.prototype = new Spry.Effect.Animator();
Spry.Effect.Size.prototype.constructor = Spry.Effect.Size;

Spry.Effect.Size.prototype.animate = function(position)
{
	var width = 0;
	var height = 0;
	var fontSize = 0;

	if (this.direction == Spry.forwards) {
		width = this.startWidth - (this.widthRange * position);
		height = this.startHeight - (this.heightRange * position);
		fontSize = this.fontFactor*(this.startWidth + position*(this.stopWidth - this.startWidth))/this.originalWidth;
	} else if (this.direction == Spry.backwards) {
		width = this.widthRange * position + this.stopWidth;
		height = this.heightRange * position + this.stopHeight;
		fontSize = this.fontFactor*(this.stopWidth + position*(this.startWidth - this.stopWidth))/this.originalWidth;
	}
	if (this.options.scaleContent == true)
		this.element.style.fontSize = fontSize + 'em';

	//Spry.Debug.trace(fontSize);

	this.element.style.width = width + this.units;
	this.element.style.height = height + this.units;

	if(this.options.scaleContent)
	{
		var propFactor = (this.direction == Spry.forwards) ? (this.startWidth + position*(this.stopWidth - this.startWidth))/this.originalWidth
														   : (this.stopWidth + position*(this.startWidth - this.stopWidth))/this.originalWidth;

		for(var i=0; i < this.childImages.length; i++)
		{
			this.childImages[i][0].style.width = propFactor * this.childImages[i][1] + this.units;
			this.childImages[i][0].style.height = propFactor * this.childImages[i][2] + this.units;
		}
	}

	if(this.enforceVisible)
	{
		Spry.Effect.enforceVisible(this.element);
		this.enforceVisible = false;
	}
};

Spry.Effect.Size.prototype.prepareStart = function() 
{
	if (this.dynamicFromRect == true)
	{
		var fromRect = Spry.Effect.getDimensions(element);
		this.startWidth = fromRect.width;
		this.startHeight = fromRect.height;
	
		this.widthRange = this.startWidth - this.stopWidth;
		this.heightRange = this.startHeight - this.stopHeight;
	}
};

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.Opacity
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.Opacity = function(element, startOpacity, stopOpacity, options)
{
	this.dynamicStartOpacity = false;
	if (arguments.length == 3)
	{
		options = stopOpacity;
		stopOpacity = startOpacity;
		startOpacity = Spry.Effect.getOpacity(element);
		this.dynamicStartOpacity = true;
	}

	Spry.Effect.Animator.call(this, options);

	this.name = 'Opacity';
	this.element = Spry.Effect.getElement(element);

    // make this work on IE on elements without 'layout'
    if(/MSIE/.test(navigator.userAgent) && (!this.element.hasLayout))
	  Spry.Effect.setStyleProp(this.element, 'zoom', '1');

	this.startOpacity = startOpacity;
	this.stopOpacity = stopOpacity;
	this.opacityRange = this.startOpacity - this.stopOpacity;
	this.enforceVisible = Spry.Effect.isInvisible(this.element);
};

Spry.Effect.Opacity.prototype = new Spry.Effect.Animator();
Spry.Effect.Opacity.prototype.constructor = Spry.Effect.Opacity;

Spry.Effect.Opacity.prototype.animate = function(position)
{
	var opacity = 0;

	if (this.direction == Spry.forwards) {
		opacity = this.startOpacity - (this.opacityRange * position);
	} else if (this.direction == Spry.backwards) {
		opacity = this.opacityRange * position + this.stopOpacity;
	}
	
	this.element.style.opacity = opacity;
	this.element.style.filter = "alpha(opacity=" + Math.floor(opacity * 100) + ")";

	if(this.enforceVisible)
	{
		Spry.Effect.enforceVisible(this.element);
		this.enforceVisible = false;
	}
};

Spry.Effect.Size.prototype.prepareStart = function() 
{
	if (this.dynamicStartOpacity == true)
	{
		this.startOpacity = Spry.Effect.getOpacity(element);
		this.opacityRange = this.startOpacity - this.stopOpacity;
	}
};

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.Color
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.Color = function(element, startColor, stopColor, options)
{
	this.dynamicStartColor = false;
	if (arguments.length == 3)
	{
		options = stopColor;
		stopColor = startColor;
		startColor = Spry.Effect.getColor(element);
		this.dynamicStartColor = true;
	}
	
	Spry.Effect.Animator.call(this, options);

	this.name = 'Color';
	this.element = Spry.Effect.getElement(element);

	this.startColor = startColor;
	this.stopColor = stopColor;
	this.startRedColor = Spry.Effect.Utils.hexToInt(startColor.substr(1,2));
	this.startGreenColor = Spry.Effect.Utils.hexToInt(startColor.substr(3,2));
	this.startBlueColor = Spry.Effect.Utils.hexToInt(startColor.substr(5,2));
	this.stopRedColor = Spry.Effect.Utils.hexToInt(stopColor.substr(1,2));
	this.stopGreenColor = Spry.Effect.Utils.hexToInt(stopColor.substr(3,2));
	this.stopBlueColor = Spry.Effect.Utils.hexToInt(stopColor.substr(5,2));
	this.redColorRange = this.startRedColor - this.stopRedColor;
	this.greenColorRange = this.startGreenColor - this.stopGreenColor;
	this.blueColorRange = this.startBlueColor - this.stopBlueColor;
};

Spry.Effect.Color.prototype = new Spry.Effect.Animator();
Spry.Effect.Color.prototype.constructor = Spry.Effect.Color;

Spry.Effect.Color.prototype.animate = function(position)
{
	var redColor = 0;
	var greenColor = 0;
	var blueColor = 0;
	
	if (this.direction == Spry.forwards) {
		redColor = parseInt(this.startRedColor - (this.redColorRange * position));
		greenColor = parseInt(this.startGreenColor - (this.greenColorRange * position));
		blueColor = parseInt(this.startBlueColor - (this.blueColorRange * position));
	} else if (this.direction == Spry.backwards) {
		redColor = parseInt(this.redColorRange * position) + this.stopRedColor;
		greenColor = parseInt(this.greenColorRange * position) + this.stopGreenColor;
		blueColor = parseInt(this.blueColorRange * position) + this.stopBlueColor;
	}

	this.element.style.backgroundColor = Spry.Effect.Utils.rgb(redColor, greenColor, blueColor);
};

Spry.Effect.Size.prototype.prepareStart = function() 
{
	if (this.dynamicStartColor == true)
	{
		this.startColor = Spry.Effect.getColor(element);
		this.startRedColor = Spry.Effect.Utils.hexToInt(startColor.substr(1,2));
		this.startGreenColor = Spry.Effect.Utils.hexToInt(startColor.substr(3,2));
		this.startBlueColor = Spry.Effect.Utils.hexToInt(startColor.substr(5,2));
		this.redColorRange = this.startRedColor - this.stopRedColor;
		this.greenColorRange = this.startGreenColor - this.stopGreenColor;
		this.blueColorRange = this.startBlueColor - this.stopBlueColor;
	}
};

//////////////////////////////////////////////////////////////////////
//
// Spry.Effect.Cluster
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.Cluster = function(options)
{
	
	Spry.Effect.Animator.call(this, options);

	this.name = 'Cluster';

	this.effectsArray = new Array();
	this.currIdx = -1;

	_ClusteredEffect = function(effect, kind)
	{
		this.effect = effect;
		this.kind = kind; // "parallel" or "queue"
		this.isRunning = false;
	};
	
	this.ClusteredEffect = _ClusteredEffect;

};

Spry.Effect.Cluster.prototype = new Spry.Effect.Animator();
Spry.Effect.Cluster.prototype.constructor = Spry.Effect.Cluster;

Spry.Effect.Cluster.prototype.drawEffect = function()
{
	var isRunning = true;
	var allEffectsDidRun = false;
	
	if (this.currIdx == -1)
		this.initNextEffectsRunning();

	var baseEffectIsStillRunning = false;
	var evalNextEffectsRunning = false
	for (var i = 0; i < this.effectsArray.length; i++)
	{
		if (this.effectsArray[i].isRunning == true)
		{
			baseEffectIsStillRunning = this.effectsArray[i].effect.drawEffect();
			if (baseEffectIsStillRunning == false && i == this.currIdx)
			{
				this.effectsArray[i].isRunning = false;
				evalNextEffectsRunning = true;
			}
		}
	}
	if (evalNextEffectsRunning == true)
	{
		allEffectsDidRun = this.initNextEffectsRunning();
	}
	
	if (allEffectsDidRun == true) {
		this.stop();
		isRunning = false;
		for (var i = 0; i < this.effectsArray.length; i++)
		{
			this.effectsArray[i].isRunning = false;
		}
		this.currIdx = -1;
	}

	return isRunning;
	
};

Spry.Effect.Cluster.prototype.initNextEffectsRunning = function()
{
	var allEffectsDidRun = false;
	this.currIdx++;
	if (this.currIdx > (this.effectsArray.length - 1))
	{
		allEffectsDidRun = true;
	}
	else 
	{
		for (var i = this.currIdx; i < this.effectsArray.length; i++)
		{
			if ((i > this.currIdx) && this.effectsArray[i].kind == "queue")
				break;
				
			this.effectsArray[i].effect.start(true);
			this.effectsArray[i].isRunning = true;
			this.currIdx = i;
		};
	}
	return allEffectsDidRun;
};

Spry.Effect.Cluster.prototype.doToggle = function()
{
	if (this.options.toggle == true) {
		if (this.direction == Spry.forwards) {
			this.direction = Spry.backwards;
		} else if (this.direction == Spry.backwards) {
			this.direction = Spry.forwards;
		}
	}
	// toggle all effects of the cluster, too
	for (var i = 0; i < this.effectsArray.length; i++) 
	{
		if (this.effectsArray[i].effect.options && (this.effectsArray[i].effect.options.toggle != null)) {
			if (this.effectsArray[i].effect.options.toggle == true)
			{
				this.effectsArray[i].effect.doToggle();
			}
		}
	}
};

Spry.Effect.Cluster.prototype.cancel = function()
{
	for (var i = 0; i < this.effectsArray.length; i++)
	{
		this.effectsArray[i].effect.cancel();
	}
	if (this.timer) {
		clearInterval(this.timer);
		this.timer = null;
	}
	this.isRunning = false;
};

Spry.Effect.Cluster.prototype.addNextEffect = function(effect)
{
	this.effectsArray[this.effectsArray.length] = new this.ClusteredEffect(effect, "queue");
	if (this.effectsArray.length == 1) {
		// with the first added effect we know the element
		// that the cluster is working on
		this.element = effect.element;
	}
};

Spry.Effect.Cluster.prototype.addParallelEffect = function(effect)
{
	this.effectsArray[this.effectsArray.length] = new this.ClusteredEffect(effect, "parallel");
	if (this.effectsArray.length == 1) {
		// with the first added effect we know the element
		// that the cluster is working on
		this.element = effect.element;
	}
};

//////////////////////////////////////////////////////////////////////
//
// Combination effects
// Custom effects can be build by combining basic effect bahaviour
// like Move, Size, Color, Opacity
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.AppearFade = function (element, options) 
{
	var element = Spry.Effect.getElement(element);

	var durationInMilliseconds = 1000;
	var fromOpacity = 0.0;
	var toOpacity = 100.0;
	var doToggle = false;
	var kindOfTransition = Spry.sinusoidalTransition;
	var setupCallback = null;
	var finishCallback = null;

	if (options)
	{
		if (options.duration != null) durationInMilliseconds = options.duration;
		if (options.from != null) fromOpacity = options.from;
		if (options.to != null) toOpacity = options.to;
		if (options.toggle != null) doToggle = options.toggle;
		if (options.transition != null) kindOfTransition = options.transition;
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}
	options = {duration: durationInMilliseconds, toggle: doToggle, transition: kindOfTransition, setup: setupCallback, finish: finishCallback, from: fromOpacity, to: toOpacity};

	fromOpacity = fromOpacity/ 100.0;
	toOpacity = toOpacity / 100.0;

	var appearFadeEffect = new Spry.Effect.Opacity(element, fromOpacity, toOpacity, options);

	appearFadeEffect.name = 'AppearFade';
	var registeredEffect = SpryRegistry.getRegisteredEffect(element, appearFadeEffect);
	registeredEffect.start();
	return registeredEffect;
};


Spry.Effect.Blind = function (element, options) 
{
	var element = Spry.Effect.getElement(element);

	Spry.Effect.makeClipping(element);

	var durationInMilliseconds = 1000;
	var doToggle = false;
	var kindOfTransition = Spry.sinusoidalTransition;
	var doScaleContent = false;
	var setupCallback = null;
	var finishCallback = null;
	var originalRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);
	var fromHeightPx  = originalRect.height;
	var toHeightPx    = 0;
	var optionFrom = options ? options.from : originalRect.height;
	var optionTo   = options ? options.to : 0;

	if (options)
	{
		if (options.duration != null) durationInMilliseconds = options.duration;
		if (options.from != null)
		{
			if (Spry.Effect.Utils.isPercentValue(options.from))
				fromHeightPx = Spry.Effect.Utils.getPercentValue(options.from) * originalRect.height / 100;
			else
				fromHeightPx = Spry.Effect.Utils.getPixelValue(options.from);
		}
		if (options.to != null)
		{
			if (Spry.Effect.Utils.isPercentValue(options.to))
				toHeightPx = Spry.Effect.Utils.getPercentValue(options.to) * originalRect.height / 100;
			else
				toHeightPx = Spry.Effect.Utils.getPixelValue(options.to);
		}
		if (options.toggle != null) doToggle = options.toggle;
		if (options.transition != null) kindOfTransition = options.transition;
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}

	var fromRect = new Spry.Effect.Utils.Rectangle;
	fromRect.width = originalRect.width;
	fromRect.height = fromHeightPx;

	var toRect = new Spry.Effect.Utils.Rectangle;
	toRect.width = originalRect.width;
	toRect.height = toHeightPx;

	options = {duration:durationInMilliseconds, toggle:doToggle, transition:kindOfTransition, scaleContent:doScaleContent, setup: setupCallback, finish: finishCallback, from: optionFrom, to: optionTo};

	var blindEffect = new Spry.Effect.Size(element, fromRect, toRect, options);
	blindEffect.name = 'Blind';
	var registeredEffect = SpryRegistry.getRegisteredEffect(element, blindEffect);
	registeredEffect.start();
	return registeredEffect;
};


function setupHighlight(element, effect) 
{
	Spry.Effect.setStyleProp(element, 'background-image', 'none');
};

function finishHighlight(element, effect) 
{
	Spry.Effect.setStyleProp(element, 'background-image', effect.options.restoreBackgroundImage);

	if (effect.direction == Spry.forwards)
		Spry.Effect.setStyleProp(element, 'background-color', effect.options.restoreColor);
};

Spry.Effect.Highlight = function (element, options) 
{	
	var durationInMilliseconds = 1000;
	var toColor = "#ffffff";
	var doToggle = false;
	var kindOfTransition = Spry.sinusoidalTransition;
	var setupCallback = setupHighlight;
	var finishCallback = finishHighlight;
	var element = Spry.Effect.getElement(element);
	var fromColor = Spry.Effect.getStyleProp(element, "background-color");
	var restoreColor = fromColor;
	if (fromColor == "transparent") fromColor = "#ffff99";

	var optionFrom = options ? options.from : '#ffff00';
	var optionTo   = options ? options.to : '#0000ff';

	if (options)
	{
		if (options.duration != null) durationInMilliseconds = options.duration;
		if (options.from != null) fromColor = options.from;
		if (options.to != null) toColor = options.to;
		if (options.restoreColor) restoreColor = options.restoreColor;
		if (options.toggle != null) doToggle = options.toggle;
		if (options.transition != null) kindOfTransition = options.transition;
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}

	var restoreBackgroundImage = Spry.Effect.getStyleProp(element, 'background-image');
	
	options = {duration: durationInMilliseconds, toggle: doToggle, transition: kindOfTransition, setup: setupCallback, finish: finishCallback, restoreColor: restoreColor, restoreBackgroundImage: restoreBackgroundImage, from: optionFrom, to: optionTo};

	var highlightEffect = new Spry.Effect.Color(element, fromColor, toColor, options);
	highlightEffect.name = 'Highlight';
	var registeredEffect = SpryRegistry.getRegisteredEffect(element, highlightEffect);
	registeredEffect.start();
	return registeredEffect;	
};

Spry.Effect.Slide = function (element, options) 
{
	var element = Spry.Effect.getElement(element);

	var durationInMilliseconds = 2000;
	var doToggle = false;
	var kindOfTransition = Spry.sinusoidalTransition;
	var slideHorizontally = false;
	var setupCallback = null;
	var finishCallback = null;
	var firstChildElt = Spry.Effect.Utils.getFirstChildElement(element);

	// IE 7 does not clip static positioned elements -> make element position relative
	if(/MSIE 7.0/.test(navigator.userAgent) && /Windows NT/.test(navigator.userAgent))
		Spry.Effect.makePositioned(element);

	Spry.Effect.makeClipping(element);

	// for IE 6 on win: check if position is static or fixed -> not supported and would cause trouble
	if(/MSIE 6.0/.test(navigator.userAgent) && /Windows NT/.test(navigator.userAgent))
	{
		var pos = Spry.Effect.getStyleProp(element, 'position');
		if(pos && (pos == 'static' || pos == 'fixed'))
		{
			Spry.Effect.setStyleProp(element, 'position', 'relative');
			Spry.Effect.setStyleProp(element, 'top', '');
			Spry.Effect.setStyleProp(element, 'left', '');
		}
	}

	if(firstChildElt)
	{
		Spry.Effect.makePositioned(firstChildElt);
		Spry.Effect.makeClipping(firstChildElt);

    	var childRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(firstChildElt, element);
		Spry.Effect.setStyleProp(firstChildElt, 'width', childRect.width + 'px');
	}

	var elementRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);
	var startOffsetPosition = new Spry.Effect.Utils.Position();
	startOffsetPosition.x = parseInt(Spry.Effect.getStyleProp(firstChildElt, "left"));
	startOffsetPosition.y = parseInt(Spry.Effect.getStyleProp(firstChildElt, "top"));
	if (!startOffsetPosition.x) startOffsetPosition.x = 0;
	if (!startOffsetPosition.y) startOffsetPosition.y = 0;

	if (options && options.horizontal !== null && options.horizontal === true)
		slideHorizontally = true;

	var movePx = slideHorizontally ? elementRect.width : elementRect.height;
	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = startOffsetPosition.x;
	fromPos.y = startOffsetPosition.y;

	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = slideHorizontally ? startOffsetPosition.x - movePx : startOffsetPosition.x;
	toPos.y = slideHorizontally ? startOffsetPosition.y : startOffsetPosition.y - movePx;

	var optionFrom = options ? options.from : elementRect.height;
	var optionTo   = options ? options.to : 0;

	if (options)
	{
		if (options.duration != null) durationInMilliseconds = options.duration;

		if (options.from != null)
		{
		    if(slideHorizontally)
		    {
			    if (Spry.Effect.Utils.isPercentValue(options.from))
				    fromPos.x = movePx * Spry.Effect.Utils.getPercentValue(options.from) / 100;
			    else
				    fromPos.x = Spry.Effect.Utils.getPixelValue(options.from);
			}
			else
			{
			    if (Spry.Effect.Utils.isPercentValue(options.from))
				    fromPos.y = movePx * Spry.Effect.Utils.getPercentValue(options.from) / 100;
			    else
				    fromPos.y = Spry.Effect.Utils.getPixelValue(options.from);
			}
		}

		if (options.to != null)
		{
		    if(slideHorizontally)
		    {
			    if (Spry.Effect.Utils.isPercentValue(options.to))
				    toPos.x = movePx * Spry.Effect.Utils.getPercentValue(options.to) / 100;
			    else
				    toPos.x = Spry.Effect.Utils.getPixelValue(options.to);
		    }
		    else
		    {
			    if (Spry.Effect.Utils.isPercentValue(options.to))
				    toPos.y = movePx * Spry.Effect.Utils.getPercentValue(options.to) / 100;
			    else
				    toPos.y = Spry.Effect.Utils.getPixelValue(options.to);
			}
		}

		if (options.toggle != null) doToggle = options.toggle;
		if (options.transition != null) kindOfTransition = options.transition;
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}

	options = {duration:durationInMilliseconds, toggle:doToggle, transition:kindOfTransition, setup: setupCallback, finish: finishCallback, from: optionFrom, to: optionTo};
	
	var slideEffect = new Spry.Effect.MoveSlide(element, fromPos, toPos, slideHorizontally, options);
	slideEffect.name = 'Slide';
	var registeredEffect = SpryRegistry.getRegisteredEffect(element, slideEffect);
	registeredEffect.start();
	return registeredEffect;
};


Spry.Effect.GrowShrink = function (element, options) 
{
	var element = Spry.Effect.getElement(element);

	Spry.Effect.makePositioned(element); // for move
	Spry.Effect.makeClipping(element);

	var startOffsetPosition = new Spry.Effect.Utils.Position();
	startOffsetPosition.x = parseInt(Spry.Effect.getStylePropRegardlessOfDisplayState(element, "left"));
	startOffsetPosition.y = parseInt(Spry.Effect.getStylePropRegardlessOfDisplayState(element, "top"));	
	if (!startOffsetPosition.x) startOffsetPosition.x = 0;
	if (!startOffsetPosition.y) startOffsetPosition.y = 0;

	var dimRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);
	var originalWidth = dimRect.width;
	var originalHeight = dimRect.height;
	var propFactor = (originalWidth == 0) ? 1 :originalHeight/originalWidth;

	var durationInMilliseconds = 500;
	var doToggle = false;
	var kindOfTransition = Spry.sinusoidalTransition;

	var fromRect = new Spry.Effect.Utils.Rectangle;
	fromRect.width = 0;
	fromRect.height = 0;

	var toRect = new Spry.Effect.Utils.Rectangle;
	toRect.width = originalWidth;
	toRect.height = originalHeight;

	var setupCallback = null;
	var finishCallback = null;

	var doScaleContent = true;

	var optionFrom = options ? options.from : dimRect.width;
	var optionTo   = options ? options.to : 0;

	var calcHeight = false;
	var growFromCenter = true;

	if (options)
	{
		if (options.referHeight != null) calcHeight = options.referHeight;
		if (options.growCenter != null) growFromCenter = options.growCenter;
		if (options.duration != null) durationInMilliseconds = options.duration;
		if (options.from != null) 
		{
			if (Spry.Effect.Utils.isPercentValue(options.from))
			{
				fromRect.width = originalWidth * (Spry.Effect.Utils.getPercentValue(options.from) / 100);
				fromRect.height = originalHeight * (Spry.Effect.Utils.getPercentValue(options.from) / 100);
			}
			else
			{
				if(calcHeight)
				{
					fromRect.height = Spry.Effect.Utils.getPixelValue(options.from);
					fromRect.width  = Spry.Effect.Utils.getPixelValue(options.from) / propFactor;
				}
				else
				{
					fromRect.width = Spry.Effect.Utils.getPixelValue(options.from);
					fromRect.height = propFactor * Spry.Effect.Utils.getPixelValue(options.from);
				}
			}
		}
		if (options.to != null) 
		{
			if (Spry.Effect.Utils.isPercentValue(options.to))
			{
				toRect.width = originalWidth * (Spry.Effect.Utils.getPercentValue(options.to) / 100);
				toRect.height = originalHeight * (Spry.Effect.Utils.getPercentValue(options.to) / 100);
			}
			else
			{
				if(calcHeight)
				{
					toRect.height = Spry.Effect.Utils.getPixelValue(options.to);
					toRect.width  = Spry.Effect.Utils.getPixelValue(options.to) / propFactor;
				}
				else
				{
					toRect.width = Spry.Effect.Utils.getPixelValue(options.to);
					toRect.height = propFactor * Spry.Effect.Utils.getPixelValue(options.to);
				}
			}
		}
		if (options.toggle != null) doToggle = options.toggle;
		if (options.transition != null) kindOfTransition = options.transition;
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;		
	}

	options = {duration:durationInMilliseconds, toggle:doToggle, transition:kindOfTransition, scaleContent:doScaleContent, from: optionFrom, to: optionTo};
	
	var effectCluster = new Spry.Effect.Cluster({toggle: doToggle, setup: setupCallback, finish: finishCallback});
	effectCluster.name = 'GrowShrink';
	
	var sizeEffect = new Spry.Effect.Size(element, fromRect, toRect, options);
	effectCluster.addParallelEffect(sizeEffect);

	if(growFromCenter)
	{
		options = {duration:durationInMilliseconds, toggle:doToggle, transition:kindOfTransition, from: optionFrom, to: optionTo};
		var fromPos = new Spry.Effect.Utils.Position;
		fromPos.x = startOffsetPosition.x + (originalWidth - fromRect.width) / 2.0;
		fromPos.y = startOffsetPosition.y + (originalHeight -fromRect.height) / 2.0;

		var toPos = new Spry.Effect.Utils.Position;
		toPos.x = startOffsetPosition.x + (originalWidth - toRect.width) / 2.0;
		toPos.y = startOffsetPosition.y + (originalHeight -toRect.height) / 2.0;

		var initialProps2 = {top: fromPos.y, left: fromPos.x};

		var moveEffect = new Spry.Effect.Move(element, fromPos, toPos, options, initialProps2);
		effectCluster.addParallelEffect(moveEffect);
	}

	var registeredEffect = SpryRegistry.getRegisteredEffect(element, effectCluster);
	registeredEffect.start();
	return registeredEffect;
};


Spry.Effect.Shake = function (element, options) 
{
	var element = Spry.Effect.getElement(element);

	Spry.Effect.makePositioned(element);
	

	var setupCallback = null;
	var finishCallback = null;

	if (options)
	{
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}

	var startOffsetPosition = new Spry.Effect.Utils.Position();
	startOffsetPosition.x = parseInt(Spry.Effect.getStyleProp(element, "left"));
	startOffsetPosition.y = parseInt(Spry.Effect.getStyleProp(element, "top"));	
	if (!startOffsetPosition.x) startOffsetPosition.x = 0;
	if (!startOffsetPosition.y) startOffsetPosition.y = 0;	

	var shakeEffectCluster = new Spry.Effect.Cluster({setup: setupCallback, finish: finishCallback});
	shakeEffectCluster.name = 'Shake';

	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = startOffsetPosition.x + 0;
	fromPos.y = startOffsetPosition.y + 0;

	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = startOffsetPosition.x + 20;
	toPos.y = startOffsetPosition.y + 0;

	options = {duration:50, toggle:false};
	var effect = new Spry.Effect.Move(element, fromPos, toPos, options);
	shakeEffectCluster.addNextEffect(effect);
	
	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = startOffsetPosition.x + 20;
	fromPos.y = startOffsetPosition.y + 0;

	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = startOffsetPosition.x + -20;
	toPos.y = startOffsetPosition.y + 0;

	options = {duration:100, toggle:false};
	var effect = new Spry.Effect.Move(element, fromPos, toPos, options);
	shakeEffectCluster.addNextEffect(effect);

	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = startOffsetPosition.x + -20;
	fromPos.y = startOffsetPosition.y + 0;

	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = startOffsetPosition.x + 20;
	toPos.y = startOffsetPosition.y + 0;

	options = {duration:100, toggle:false};
	var effect = new Spry.Effect.Move(element, fromPos, toPos, options);
	shakeEffectCluster.addNextEffect(effect);

	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = startOffsetPosition.x + 20;
	fromPos.y = startOffsetPosition.y + 0;

	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = startOffsetPosition.x + -20;
	toPos.y = startOffsetPosition.y + 0;

	options = {duration:100, toggle:false};
	var effect = new Spry.Effect.Move(element, fromPos, toPos, options);
	shakeEffectCluster.addNextEffect(effect);

	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = startOffsetPosition.x + -20;
	fromPos.y = startOffsetPosition.y + 0;

	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = startOffsetPosition.x + 20;
	toPos.y = startOffsetPosition.y + 0;

	options = {duration:100, toggle:false};
	var effect = new Spry.Effect.Move(element, fromPos, toPos, options);
	shakeEffectCluster.addNextEffect(effect);

	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = startOffsetPosition.x + 20;
	fromPos.y = startOffsetPosition.y + 0;

	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = startOffsetPosition.x + 0;
	toPos.y = startOffsetPosition.y + 0;

	options = {duration:50, toggle:false};
	var effect = new Spry.Effect.Move(element, fromPos, toPos, options);
	shakeEffectCluster.addNextEffect(effect);
	
	var registeredEffect = SpryRegistry.getRegisteredEffect(element, shakeEffectCluster);
	registeredEffect.start();
	return registeredEffect;
}

Spry.Effect.Squish = function (element, options) 
{
	var element = Spry.Effect.getElement(element);
	
	var durationInMilliseconds = 500;
	var doToggle = true;

	var setupCallback = null;
	var finishCallback = null;

	if (options)
	{
		if (options.duration != null) durationInMilliseconds = options.duration;
		if (options.toggle != null) doToggle = options.toggle;
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}

	Spry.Effect.makePositioned(element); // for move
	Spry.Effect.makeClipping(element);

	var originalRect = Spry.Effect.getDimensionsRegardlessOfDisplayState(element);

	var startWidth = originalRect.width;
	var startHeight = originalRect.height;

	var stopWidth = 0;
	var stopHeight = 0;

	var fromRect = new Spry.Effect.Utils.Rectangle;
	fromRect.width = startWidth;
	fromRect.height = startHeight;
	
	var toRect = new Spry.Effect.Utils.Rectangle;
	toRect.width = stopWidth;
	toRect.height = stopHeight;
	
	var doScaleContent = true;

	options = {duration:durationInMilliseconds, toggle:doToggle, scaleContent:doScaleContent, setup: setupCallback, finish: finishCallback};

	var squishEffect = new Spry.Effect.Size(element, fromRect, toRect, options);
	squishEffect.name = 'Squish';

	var registeredEffect = SpryRegistry.getRegisteredEffect(element, squishEffect);
	registeredEffect.start();
	return registeredEffect;
};

Spry.Effect.Pulsate = function (element, options) 
{
	var element = Spry.Effect.getElement(element);
	
	var durationInMilliseconds = 400;
	var fromOpacity = 100.0;
	var toOpacity = 0.0;
	var doToggle = false;
	var kindOfTransition = Spry.linearTransition;
	var setupCallback = null;
	var finishCallback = null;

	if (options)
	{
		if (options.duration != null) durationInMilliseconds = options.duration;
		if (options.from != null) fromOpacity = options.from;
		if (options.to != null) toOpacity = options.to;
		if (options.toggle != null) doToggle = options.toggle;
		if (options.transition != null) kindOfTransition = options.transition;
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}
	options = {duration:durationInMilliseconds, toggle:doToggle, transition:kindOfTransition, setup: setupCallback, finish: finishCallback};
	fromOpacity = fromOpacity / 100.0;
	toOpacity = toOpacity / 100.0;
	
	var pulsateEffectCluster = new Spry.Effect.Cluster();
	
	var fadeEffect = new Spry.Effect.Opacity(element, fromOpacity, toOpacity, options);
	var appearEffect = new Spry.Effect.Opacity(element, toOpacity, fromOpacity, options);
	
	pulsateEffectCluster.addNextEffect(fadeEffect);
	pulsateEffectCluster.addNextEffect(appearEffect);
	pulsateEffectCluster.addNextEffect(fadeEffect);
	pulsateEffectCluster.addNextEffect(appearEffect);
	pulsateEffectCluster.addNextEffect(fadeEffect);
	pulsateEffectCluster.addNextEffect(appearEffect);
	
	pulsateEffectCluster.name = 'Pulsate';

	var registeredEffect = SpryRegistry.getRegisteredEffect(element, pulsateEffectCluster);
	registeredEffect.start();
	return registeredEffect;
};

Spry.Effect.Puff = function (element, options) 
{
	var element = Spry.Effect.getElement(element);
	
	Spry.Effect.makePositioned(element); // for move

	var setupCallback = null;
	var finishCallback = null;

	if (options)
	{
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}

	var puffEffectCluster = new Spry.Effect.Cluster;
	var durationInMilliseconds = 500;

	var originalRect = Spry.Effect.getDimensions(element);
	
	var startWidth = originalRect.width;
	var startHeight = originalRect.height;
		
	var stopWidth = startWidth * 2;
	var stopHeight = startHeight * 2;
	
	var fromRect = new Spry.Effect.Utils.Rectangle;
	fromRect.width = startWidth;
	fromRect.height = startHeight;
	
	var toRect = new Spry.Effect.Utils.Rectangle;
	toRect.width = stopWidth;
	toRect.height = stopHeight;
	
	var doScaleContent = false;
	
	options = {duration:durationInMilliseconds, toggle:false, scaleContent:doScaleContent};
	var sizeEffect = new Spry.Effect.Size(element, fromRect, toRect, options);
	puffEffectCluster.addParallelEffect(sizeEffect);

	options = {duration:durationInMilliseconds, toggle:false};
	var fromOpacity = 1.0;
	var toOpacity = 0.0;
	var opacityEffect = new Spry.Effect.Opacity(element, fromOpacity, toOpacity, options);
	puffEffectCluster.addParallelEffect(opacityEffect);

	options = {duration:durationInMilliseconds, toggle:false};
	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = 0;
	fromPos.y = 0;
	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = startWidth / 2.0 * -1.0;
	toPos.y = startHeight / 2.0 * -1.0;
	var moveEffect = new Spry.Effect.Move(element, fromPos, toPos, options);
	puffEffectCluster.addParallelEffect(moveEffect);

	puffEffectCluster.setup = setupCallback;
	puffEffectCluster.finish = finishCallback;
	puffEffectCluster.name = 'Puff';
	
	var registeredEffect = SpryRegistry.getRegisteredEffect(element, puffEffectCluster);
	registeredEffect.start();
	return registeredEffect;
};

Spry.Effect.DropOut = function (element, options) 
{
	var element = Spry.Effect.getElement(element);
	
	var dropoutEffectCluster = new Spry.Effect.Cluster;
	
	var durationInMilliseconds = 500;

	Spry.Effect.makePositioned(element);

	var setupCallback = null;
	var finishCallback = null;

	if (options)
	{
		if (options.setup != null) setupCallback = options.setup;
		if (options.finish != null) finishCallback = options.finish;
	}

	var startOffsetPosition = new Spry.Effect.Utils.Position();
	startOffsetPosition.x = parseInt(Spry.Effect.getStyleProp(element, "left"));
	startOffsetPosition.y = parseInt(Spry.Effect.getStyleProp(element, "top"));	
	if (!startOffsetPosition.x) startOffsetPosition.x = 0;
	if (!startOffsetPosition.y) startOffsetPosition.y = 0;	
	
	var fromPos = new Spry.Effect.Utils.Position;
	fromPos.x = startOffsetPosition.x + 0;
	fromPos.y = startOffsetPosition.y + 0;

	var toPos = new Spry.Effect.Utils.Position;
	toPos.x = startOffsetPosition.x + 0;
	toPos.y = startOffsetPosition.y + 160;

	options = {from:fromPos, to:toPos, duration:durationInMilliseconds, toggle:true};
	var moveEffect = new Spry.Effect.Move(element, options.from, options.to, options);
	dropoutEffectCluster.addParallelEffect(moveEffect);

	options = {duration:durationInMilliseconds, toggle:true};
	var fromOpacity = 1.0;
	var toOpacity = 0.0;
	var opacityEffect = new Spry.Effect.Opacity(element, fromOpacity, toOpacity, options);
	dropoutEffectCluster.addParallelEffect(opacityEffect);

	dropoutEffectCluster.setup = setupCallback;
	dropoutEffectCluster.finish = finishCallback;
	dropoutEffectCluster.name = 'DropOut';
	
	var registeredEffect = SpryRegistry.getRegisteredEffect(element, dropoutEffectCluster);
	registeredEffect.start();
	return registeredEffect;
};

Spry.Effect.Fold = function (element, options) 
{
	var element = Spry.Effect.getElement(element);
	
	var durationInMilliseconds = 1000;
	var doToggle = false;
	var doScaleContent = true;
	
	var foldEffectCluster = new Spry.Effect.Cluster();

	var originalRect = Spry.Effect.getDimensions(element);

	var startWidth = originalRect.width;
	var startHeight = originalRect.height;
		
	var stopWidth = startWidth;
	var stopHeight = startHeight / 5;
	
	var fromRect = new Spry.Effect.Utils.Rectangle;
	fromRect.width = startWidth;
	fromRect.height = startHeight;
	
	var toRect = new Spry.Effect.Utils.Rectangle;
	toRect.width = stopWidth;
	toRect.height = stopHeight;
	
	options = {duration:durationInMilliseconds, toggle:doToggle, scaleContent:doScaleContent};
	var sizeEffect = new Spry.Effect.Size(element, fromRect, toRect, options);
	foldEffectCluster.addNextEffect(sizeEffect);
	
	durationInMilliseconds = 500;
	options = {duration:durationInMilliseconds, toggle:doToggle, scaleContent:doScaleContent};
	fromRect.width = "100%";
	fromRect.height = "20%";
	toRect.width = "10%";
	toRect.height = "20%";
	var sizeEffect = new Spry.Effect.Size(element, fromRect, toRect, options);
	foldEffectCluster.addNextEffect(sizeEffect);
	foldEffectCluster.name = 'Fold';
	
	var registeredEffect = SpryRegistry.getRegisteredEffect(element, foldEffectCluster);
	registeredEffect.start();
	return registeredEffect;
};

//////////////////////////////////////////////////////////////////////
//
// The names of some of the static effect functions will
// change in Spry 1.5. These wrappers will insure that we
// remain compatible with future versions of Spry.
//
//////////////////////////////////////////////////////////////////////

Spry.Effect.DoFade = function (element, options)
{
		return Spry.Effect.AppearFade(element, options);
};

Spry.Effect.DoBlind = function (element, options)
{
		return Spry.Effect.Blind(element, options);
};

Spry.Effect.DoHighlight = function (element, options)
{
		return Spry.Effect.Highlight(element, options);
};

Spry.Effect.DoSlide = function (element, options)
{
		return Spry.Effect.Slide(element, options);
};

Spry.Effect.DoGrow = function (element, options)
{
		return Spry.Effect.GrowShrink(element, options);
};

Spry.Effect.DoShake = function (element, options)
{
		return Spry.Effect.Shake(element, options);
};

Spry.Effect.DoSquish = function (element, options)
{
		return Spry.Effect.Squish(element, options);
};

Spry.Effect.DoPulsate = function (element, options)
{
		return Spry.Effect.Pulsate(element, options);
};

Spry.Effect.DoPuff = function (element, options)
{
		return Spry.Effect.Puff(element, options);
};

Spry.Effect.DoDropOut = function (element, options)
{
		return Spry.Effect.DropOut(element, options);
};

Spry.Effect.DoFold = function (element, options)
{
		return Spry.Effect.Fold(element, options);
};
/*==================================================*
 $Id: slideshow.js,v 1.16 2003/10/14 12:39:00 pat Exp $
 Copyright 2000-2003 Patrick Fitzgerald
 http://slideshow.barelyfitz.com/

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *==================================================*/

// There are two objects defined in this file:
// "slide" - contains all the information for a single slide
// "slideshow" - consists of multiple slide objects and runs the slideshow

//==================================================
// slide object
//==================================================
function slide(src,link,text,target,attr) {
  // This is the constructor function for the slide object.
  // It is called automatically when you create a new slide object.
  // For example:
  // s = new slide();

  // Image URL
  this.src = src;

  // Link URL
  this.link = link;

  // Text to display
  this.text = text;

  // Name of the target window ("_blank")
  this.target = target;

  // Custom duration for the slide, in milliseconds.
  // This is an optional parameter.
  // this.timeout = 3000

  // Attributes for the target window:
  // width=n,height=n,resizable=yes or no,scrollbars=yes or no,
  // toolbar=yes or no,location=yes or no,directories=yes or no,
  // status=yes or no,menubar=yes or no,copyhistory=yes or no
  // Example: "width=200,height=300"
  this.attr = attr;

  // Create an image object for the slide
  if (document.images) {
    this.image = new Image();
  }

  // Flag to tell when load() has already been called
  this.loaded = false;

  //--------------------------------------------------
  this.load = function() {
    // This method loads the image for the slide

    if (!document.images) { return; }

    if (!this.loaded) {
      this.image.src = this.src;
      this.loaded = true;
    }
  }

  //--------------------------------------------------
  this.hotlink = function() {
    // This method jumps to the slide's link.
    // If a window was specified for the slide, then it opens a new window.

    var mywindow;

    // If this slide does not have a link, do nothing
    if (!this.link) return;

    // Open the link in a separate window?
    if (this.target) {

      // If window attributes are specified,
      // use them to open the new window
      if (this.attr) {
        mywindow = window.open(this.link, this.target, this.attr);
  
      } else {
        // If window attributes are not specified, do not use them
        // (this will copy the attributes from the originating window)
        mywindow = window.open(this.link, this.target);
      }

      // Pop the window to the front
      if (mywindow && mywindow.focus) mywindow.focus();

    } else {
      // Open the link in the current window
      location.href = this.link;
    }
  }
}

//==================================================
// slideshow object
//==================================================
function slideshow( slideshowname ) {
  // This is the constructor function for the slideshow object.
  // It is called automatically when you create a new object.
  // For example:
  // ss = new slideshow("ss");

  // Name of this object
  // (required if you want your slideshow to auto-play)
  // For example, "SLIDES1"
  this.name = slideshowname;

  // When we reach the last slide, should we loop around to start the
  // slideshow again?
  this.repeat = true;

  // Number of images to pre-fetch.
  // -1 = preload all images.
  //  0 = load each image is it is used.
  //  n = pre-fetch n images ahead of the current image.
  // I recommend preloading all images unless you have large
  // images, or a large amount of images.
  this.prefetch = -1;

  // IMAGE element on your HTML page.
  // For example, document.images.SLIDES1IMG
  this.image;

  // ID of a DIV element on your HTML page that will contain the text.
  // For example, "slides2text"
  // Note: after you set this variable, you should call
  // the update() method to update the slideshow display.
  this.textid;

  // TEXTAREA element on your HTML page.
  // For example, document.SLIDES1FORM.SLIDES1TEXT
  // This is a depracated method for displaying the text,
  // but you might want to supply it for older browsers.
  this.textarea;

  // Milliseconds to pause between slides.
  // Individual slides can override this.
  this.timeout = 3000;

  // Hook functions to be called before and after updating the slide
  // this.pre_update_hook = function() { }
  // this.post_update_hook = function() { }

  // These are private variables
  this.slides = new Array();
  this.current = 0;
  this.timeoutid = 0;

  //--------------------------------------------------
  // Public methods
  //--------------------------------------------------
  this.add_slide = function(slide) {
    // Add a slide to the slideshow.
    // For example:
    // SLIDES1.add_slide(new slide("s1.jpg", "link.html"))
  
    var i = this.slides.length;
  
    // Prefetch the slide image if necessary
    if (this.prefetch == -1) {
      slide.load();
    }

    this.slides[i] = slide;
  }

  //--------------------------------------------------
  this.play = function(timeout) {
    // This method implements the automatically running slideshow.
    // If you specify the "timeout" argument, then a new default
    // timeout will be set for the slideshow.
  
    // Make sure we're not already playing
    this.pause();
  
    // If the timeout argument was specified (optional)
    // then make it the new default
    if (timeout) {
      this.timeout = timeout;
    }
  
    // If the current slide has a custom timeout, use it;
    // otherwise use the default timeout
    if (typeof this.slides[ this.current ].timeout != 'undefined') {
      timeout = this.slides[ this.current ].timeout;
    } else {
      timeout = this.timeout;
    }

    // After the timeout, call this.loop()
    this.timeoutid = setTimeout( this.name + ".loop()", timeout);
  }

  //--------------------------------------------------
  this.pause = function() {
    // This method stops the slideshow if it is automatically running.
  
    if (this.timeoutid != 0) {

      clearTimeout(this.timeoutid);
      this.timeoutid = 0;

    }
  }

  //--------------------------------------------------
  this.update = function() {
    // This method updates the slideshow image on the page

    // Make sure the slideshow has been initialized correctly
    if (! this.valid_image()) { return; }
  
    // Call the pre-update hook function if one was specified
    if (typeof this.pre_update_hook == 'function') {
      this.pre_update_hook();
    }

    // Convenience variable for the current slide
    var slide = this.slides[ this.current ];

    // Determine if the browser supports filters
    var dofilter = false;
    if (this.image &&
        typeof this.image.filters != 'undefined' &&
        typeof this.image.filters[0] != 'undefined') {

      dofilter = true;

    }

    // Load the slide image if necessary
    slide.load();
  
    // Apply the filters for the image transition
    if (dofilter) {

      // If the user has specified a custom filter for this slide,
      // then set it now
      if (slide.filter &&
          this.image.style &&
          this.image.style.filter) {

        this.image.style.filter = slide.filter;

      }
      this.image.filters[0].Apply();
    }

    // Update the image.
    this.image.src = slide.image.src;

    // Play the image transition filters
    if (dofilter) {
      this.image.filters[0].Play();
    }

    // Update the text
    this.display_text();

    // Call the post-update hook function if one was specified
    if (typeof this.post_update_hook == 'function') {
      this.post_update_hook();
    }

    // Do we need to pre-fetch images?
    if (this.prefetch > 0) {

      var next, prev, count;

      // Pre-fetch the next slide image(s)
      next = this.current;
      prev = this.current;
      count = 0;
      do {

        // Get the next and previous slide number
        // Loop past the ends of the slideshow if necessary
        if (++next >= this.slides.length) next = 0;
        if (--prev < 0) prev = this.slides.length - 1;

        // Preload the slide image
        this.slides[next].load();
        this.slides[prev].load();

        // Keep going until we have fetched
        // the designated number of slides

      } while (++count < this.prefetch);
    }
  }

  //--------------------------------------------------
  this.goto_slide = function(n) {
    // This method jumpts to the slide number you specify.
    // If you use slide number -1, then it jumps to the last slide.
    // You can use this to make links that go to a specific slide,
    // or to go to the beginning or end of the slideshow.
    // Examples:
    // onClick="myslides.goto_slide(0)"
    // onClick="myslides.goto_slide(-1)"
    // onClick="myslides.goto_slide(5)"
  
    if (n == -1) {
      n = this.slides.length - 1;
    }
  
    if (n < this.slides.length && n >= 0) {
      this.current = n;
    }
  
    this.update();
  }


  //--------------------------------------------------
  this.goto_random_slide = function(include_current) {
    // Picks a random slide (other than the current slide) and
    // displays it.
    // If the include_current parameter is true,
    // then 
    // See also: shuffle()

    var i;

    // Make sure there is more than one slide
    if (this.slides.length > 1) {

      // Generate a random slide number,
      // but make sure it is not the current slide
      do {
        i = Math.floor(Math.random()*this.slides.length);
      } while (i == this.current);
 
      // Display the slide
      this.goto_slide(i);
    }
  }


  //--------------------------------------------------
  this.next = function() {
    // This method advances to the next slide.

    // Increment the image number
    if (this.current < this.slides.length - 1) {
      this.current++;
    } else if (this.repeat) {
      this.current = 0;
    }

    this.update();
  }


  //--------------------------------------------------
  this.previous = function() {
    // This method goes to the previous slide.
  
    // Decrement the image number
    if (this.current > 0) {
      this.current--;
    } else if (this.repeat) {
      this.current = this.slides.length - 1;
    }
  
    this.update();
  }


  //--------------------------------------------------
  this.shuffle = function() {
    // This method randomly shuffles the order of the slides.

    var i, i2, slides_copy, slides_randomized;

    // Create a copy of the array containing the slides
    // in sequential order
    slides_copy = new Array();
    for (i = 0; i < this.slides.length; i++) {
      slides_copy[i] = this.slides[i];
    }

    // Create a new array to contain the slides in random order
    slides_randomized = new Array();

    // To populate the new array of slides in random order,
    // loop through the existing slides, picking a random
    // slide, removing it from the ordered list and adding it to
    // the random list.

    do {

      // Pick a random slide from those that remain
      i = Math.floor(Math.random()*slides_copy.length);

      // Add the slide to the end of the randomized array
      slides_randomized[ slides_randomized.length ] =
        slides_copy[i];

      // Remove the slide from the sequential array,
      // so it cannot be chosen again
      for (i2 = i + 1; i2 < slides_copy.length; i2++) {
        slides_copy[i2 - 1] = slides_copy[i2];
      }
      slides_copy.length--;

      // Keep going until we have removed all the slides

    } while (slides_copy.length);

    // Now set the slides to the randomized array
    this.slides = slides_randomized;
  }


  //--------------------------------------------------
  this.get_text = function() {
    // This method returns the text of the current slide
  
    return(this.slides[ this.current ].text);
  }


  //--------------------------------------------------
  this.get_all_text = function(before_slide, after_slide) {
    // Return the text for all of the slides.
    // For the text of each slide, add "before_slide" in front of the
    // text, and "after_slide" after the text.
    // For example:
    // document.write("<ul>");
    // document.write(s.get_all_text("<li>","\n"));
    // document.write("<\/ul>");
  
    all_text = "";
  
    // Loop through all the slides in the slideshow
    for (i=0; i < this.slides.length; i++) {
  
      slide = this.slides[i];
    
      if (slide.text) {
        all_text += before_slide + slide.text + after_slide;
      }
  
    }
  
    return(all_text);
  }


  //--------------------------------------------------
  this.display_text = function(text) {
    // Display the text for the current slide
  
    // If the "text" arg was not supplied (usually it isn't),
    // get the text from the slideshow
    if (!text) {
      text = this.slides[ this.current ].text;
    }
  
    // If a textarea has been specified,
    // then change the text displayed in it
    if (this.textarea && typeof this.textarea.value != 'undefined') {
      this.textarea.value = text;
    }

    // If a text id has been specified,
    // then change the contents of the HTML element
    if (this.textid) {

      r = this.getElementById(this.textid);
      if (!r) { return false; }
      if (typeof r.innerHTML == 'undefined') { return false; }

      // Update the text
      r.innerHTML = text;
    }
  }


  //--------------------------------------------------
  this.hotlink = function() {
    // This method calls the hotlink() method for the current slide.
  
    this.slides[ this.current ].hotlink();
  }


  //--------------------------------------------------
  this.save_position = function(cookiename) {
    // Saves the position of the slideshow in a cookie,
    // so when you return to this page, the position in the slideshow
    // won't be lost.
  
    if (!cookiename) {
      cookiename = this.name + '_slideshow';
    }
  
    document.cookie = cookiename + '=' + this.current;
  }


  //--------------------------------------------------
  this.restore_position = function(cookiename) {
  // If you previously called slideshow_save_position(),
  // returns the slideshow to the previous state.
  
    //Get cookie code by Shelley Powers
  
    if (!cookiename) {
      cookiename = this.name + '_slideshow';
    }
  
    var search = cookiename + "=";
  
    if (document.cookie.length > 0) {
      offset = document.cookie.indexOf(search);
      // if cookie exists
      if (offset != -1) { 
        offset += search.length;
        // set index of beginning of value
        end = document.cookie.indexOf(";", offset);
        // set index of end of cookie value
        if (end == -1) end = document.cookie.length;
        this.current = parseInt(unescape(document.cookie.substring(offset, end)));
        }
     }
  }


  //--------------------------------------------------
  this.noscript = function() {
    // This method is not for use as part of your slideshow,
    // but you can call it to get a plain HTML version of the slideshow
    // images and text.
    // You should copy the HTML and put it within a NOSCRIPT element, to
    // give non-javascript browsers access to your slideshow information.
    // This also ensures that your slideshow text and images are indexed
    // by search engines.
  
    $html = "\n";
  
    // Loop through all the slides in the slideshow
    for (i=0; i < this.slides.length; i++) {
  
      slide = this.slides[i];
  
      $html += '<P>';
  
      if (slide.link) {
        $html += '<a href="' + slide.link + '">';
      }
  
      $html += '<img src="' + slide.src + '" ALT="slideshow image">';
  
      if (slide.link) {
        $html += "<\/a>";
      }
  
      if (slide.text) {
        $html += "<BR>\n" + slide.text;
      }
  
      $html += "<\/P>" + "\n\n";
    }
  
    // Make the HTML browser-safe
    $html = $html.replace(/\&/g, "&amp;" );
    $html = $html.replace(/</g, "&lt;" );
    $html = $html.replace(/>/g, "&gt;" );
  
    return('<pre>' + $html + '</pre>');
  }


  //==================================================
  // Private methods
  //==================================================

  //--------------------------------------------------
  this.loop = function() {
    // This method is for internal use only.
    // This method gets called automatically by a JavaScript timeout.
    // It advances to the next slide, then sets the next timeout.
    // If the next slide image has not completed loading yet,
    // then do not advance to the next slide yet.

    // Make sure the next slide image has finished loading
    if (this.current < this.slides.length - 1) {
      next_slide = this.slides[this.current + 1];
      if (next_slide.image.complete == null || next_slide.image.complete) {
        this.next();
      }
    } else { // we're at the last slide
      this.next();
    }
    
    // Keep playing the slideshow
    this.play( );
  }


  //--------------------------------------------------
  this.valid_image = function() {
    // Returns 1 if a valid image has been set for the slideshow
  
    if (!this.image)
    {
      return false;
    }
    else {
      return true;
    }
  }

  //--------------------------------------------------
  this.getElementById = function(element_id) {
    // This method returns the element corresponding to the id

    if (document.getElementById) {
      return document.getElementById(element_id);
    }
    else if (document.all) {
      return document.all[element_id];
    }
    else if (document.layers) {
      return document.layers[element_id];
    } else {
      return undefined;
    }
  }
  

  //==================================================
  // Deprecated methods
  // I don't recommend the use of the following methods,
  // but they are included for backward compatibility.
  // You can delete them if you don't need them.
  //==================================================

  //--------------------------------------------------
  this.set_image = function(imageobject) {
    // This method is deprecated; you should use
    // the following code instead:
    // s.image = document.images.myimagename;
    // s.update();

    if (!document.images)
      return;
    this.image = imageobject;
  }

  //--------------------------------------------------
  this.set_textarea = function(textareaobject) {
    // This method is deprecated; you should use
    // the following code instead:
    // s.textarea = document.form.textareaname;
    // s.update();

    this.textarea = textareaobject;
    this.display_text();
  }

  //--------------------------------------------------
  this.set_textid = function(textidstr) {
    // This method is deprecated; you should use
    // the following code instead:
    // s.textid = "mytextid";
    // s.update();

    this.textid = textidstr;
    this.display_text();
  }
}