// Spry.Effect.js - version 0.35 - Spry Pre-Release 1.5
//
// Copyright (c) 2006. Adobe Systems Incorporated.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of Adobe Systems Incorporated nor the names of its
//     contributors may be used to endorse or promote products derived from this
//     software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

var Spry;

if (!Spry) Spry = {};

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

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

Spry.Effect.Transitions = {
	linearTransition: function(time, begin, change, duration)
	{
		if (time > duration) return change+begin;
		return begin + (time / duration) * change;
	},
	sinusoidalTransition: function(time, begin, change, duration)
	{
		if (time > duration) return change+begin;
		return begin + ((-Math.cos((time/duration)*Math.PI)/2) + 0.5) * change;
	},
	squareTransition: function(time, begin, change, duration)
	{
		if (time > duration) return change+begin;
		return begin + Math.pow(time/duration, 2) * change;
	},
	squarerootTransition: function(time, begin, change, duration)
	{
		if (time > duration) return change+begin;
		return begin + Math.sqrt(time/duration) * change;
	},
	fifthTransition: function(time, begin, change, duration)
	{
		if (time > duration) return change+begin;
		return begin + Math.sqrt((-Math.cos((time/duration)*Math.PI)/2) + 0.5) * change;
	},
	circleTransition: function(time, begin, change, duration)
	{
		if (time > duration) return change+begin;
		var pos = time/duration;
		return begin + Math.sqrt(1 - Math.pow((pos-1), 2))* change;
	},
	pulsateTransition: function(time, begin, change, duration)
	{
		if (time > duration) return change+begin;
		return begin + (0.5 + Math.sin(17*time/duration)/2) * change;
	},
	growSpecificTransition: function(time, begin, change, duration)
	{
		if (time > duration) return change+begin;
		var pos = time/duration;
		return begin + (5 * Math.pow(pos, 3) - 6.4 * Math.pow(pos, 2) + 2 * pos) * change;
	}
};
for (var trans in Spry.Effect.Transitions)
{
	Spry[trans] = Spry.Effect.Transitions[trans];
}

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

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

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

Spry.Effect.Utils.showInitError = function(effect){
	Spry.Effect.Utils.showError('The ' + effect + ' class can\'t be accessed as a static function anymore. '+ "\n" + 'Please read Spry Effects migration documentation.');
	return false;
};

Spry.Effect.Utils.camelize = function(stringToCamelize)
{
	if (stringToCamelize.indexOf('-') == -1){
		return 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;
	if (typeof value == 'string' && value.length > 0 && value.lastIndexOf("%") > 0)
		result = true;

	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;
};

//////////////////////////////////////////////////////////////////////
//
//  The notification class
//
//////////////////////////////////////////////////////////////////////
if (!Spry.Utils) Spry.Utils = {};

Spry.Utils.Notifier = function()
{
	this.observers = [];
	this.suppressNotifications = 0;
};

Spry.Utils.Notifier.prototype.addObserver = function(observer)
{
	if (!observer)
		return;

	// Make sure the observer isn't already on the list.

	var len = this.observers.length;
	for (var i = 0; i < len; i++)
		if (this.observers[i] == observer) return;

	this.observers[len] = observer;
};

Spry.Utils.Notifier.prototype.removeObserver = function(observer)
{
	if (!observer)
		return;

	for (var i = 0; i < this.observers.length; i++)
	{
		if (this.observers[i] == observer)
		{
			this.observers.splice(i, 1);
			break;
		}
	}
};

Spry.Utils.Notifier.prototype.notifyObservers = function(methodName, data)
{
	if (!methodName)
		return;

	if (!this.suppressNotifications)
	{
		var len = this.observers.length;
		for (var i = 0; i < len; i++)
		{
			var obs = this.observers[i];
			if (obs)
			{
				if (typeof obs == "function")
					obs(methodName, this, data);
				else if (obs[methodName])
					obs[methodName](this, data);
			}
		}
	}
};

Spry.Utils.Notifier.prototype.enableNotifications = function()
{
	if (--this.suppressNotifications < 0)
	{
		this.suppressNotifications = 0;
		Spry.Effect.Utils.showError("Unbalanced enableNotifications() call!\n");
	}
};

Spry.Utils.Notifier.prototype.disableNotifications = function()
{
	++this.suppressNotifications;
};

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

Spry.Effect.getElement = function(ele)
{
	var element = ele;
	if (typeof ele == "string")
		element = document.getElementById(ele);

	if (element == null) 
		Spry.Effect.Utils.showError('Element "' + ele + '" not found.');
	
	return element;
};

Spry.Effect.getStyleProp = function(element, prop)
{
	var value;
	var camelized = Spry.Effect.Utils.camelize(prop);
	try
	{
		if (element.style)
			value = element.style[camelized];

		if (!value)
		{
			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[camelized];
			}
		}
	}
	catch (e) {Spry.Effect.Utils.showError('Spry.Effect.getStyleProp: ' + e);}

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

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);}
};

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

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

Spry.Effect.Animator = function(options)
{
	Spry.Utils.Notifier.call(this);
	
	this.name = 'Animator';
	this.element = null;
	this.startMilliseconds = 0;
	this.repeat = 'none';
	this.isRunning = false;
	this.timer = null;
	this.cancelRemaining = 0;

	if (!options)
		var options = {};

	if (options.toggle)
		this.direction = false;
	else
		this.direction = Spry.forwards;
	
	var self = this;
	if (options.setup != null)
		this.addObserver({onPreEffect: function(){try{self.options.setup(self.element, self);}catch(e){Spry.Effect.Utils.showError('Spry.Effect.Animator.prototype.start: setup callback: ' + e);}}});

	if (options.finish != null)
		this.addObserver({onPostEffect: function(){try{self.options.finish(self.element, self);}catch(e){Spry.Effect.Utils.showError('Spry.Effect.Animator.prototype.stop: finish callback: ' + e);}}});

	this.options = {
		duration: 1000,
		toggle: false,
		transition: Spry.linearTransition,
		interval: 16 // ca. 62 fps
	};

	this.setOptions(options);
	if (options.transition)
		this.setTransition(options.transition);

	if (options.fps)
		this.setFps(options.fps);
};
Spry.Effect.Animator.prototype = new Spry.Utils.Notifier();
Spry.Effect.Animator.prototype.constructor = Spry.Utils.Animator;

Spry.Effect.Animator.prototype.notStaticAnimator = true;

Spry.Effect.Animator.prototype.setOptions = function(options)
{
	if (!options)
		return;
	for (var prop in options)
		this.options[prop] = options[prop];
};
Spry.Effect.Animator.prototype.setTransition = function(transition){
	if (typeof transition == 'number' || transition == "1" || transition == "2")
		switch (parseInt(transition,10))
		{
			case 1: transition = Spry.linearTransition; break;
			case 2: transition = Spry.sinusoidalTransition; break;
			default: Spry.Effect.Utils.showError('unknown transition');
		}

	else if (typeof transition == 'string')
	{
		if (typeof window[transition] == 'function')
			transition = window[transition];
		else if (typeof Spry[transition] == 'function')
			transition = Spry[transition];
		else
			Spry.Effect.Utils.showError('unknown transition');
	}

	this.options.transition = transition;
	if (typeof this.effectsArray != 'undefined'){
		var l = this.effectsArray.length;
		for (var i = 0; i < l; i++)
				this.effectsArray[i].effect.setTransition(transition);
	}
};

Spry.Effect.Animator.prototype.setDuration = function(duration){
	this.options.duration = duration;
	if (typeof this.effectsArray != 'undefined')
	{
		var l = this.effectsArray.length;
		for (var i = 0; i < l; i++)
		{
			this.effectsArray[i].effect.setDuration(duration);
		}
	}
};

Spry.Effect.Animator.prototype.setFps = function(fps){
	this.options.interval = parseInt(1000 / fps, 10);
	this.options.fps = fps;
	if (typeof this.effectsArray != 'undefined')
	{
		var l = this.effectsArray.length;
		for (var i = 0; i < l; i++)
		{
			this.effectsArray[i].effect.setFps(fps);
		}
	}
};

Spry.Effect.Animator.prototype.start = function(withoutTimer)
{
	if (!this.element)
		return;

	if (arguments.length == 0)
		withoutTimer = false;

	if (this.isRunning)
		this.cancel();

	this.prepareStart();
	var currDate = new Date();
	this.startMilliseconds = currDate.getTime();

	if (this.element.id)
		this.element = document.getElementById(this.element.id)

	if (this.cancelRemaining != 0 && this.options.toggle)
	{
		if (this.cancelRemaining < 1 && typeof this.options.transition == 'function')
		{
			var startTime = 0;
			var stopTime = this.options.duration;
			var start = 0;
			var stop = 1;
			var emergency = 0;
			this.cancelRemaining = Math.round(this.cancelRemaining * 1000) / 1000;
			var found = false;
			var middle = 0;
			while (!found)
			{
				if (emergency++ > this.options.duration) break;
				var half = startTime + ((stopTime - startTime) / 2);
				middle = Math.round(this.options.transition(half, 1, -1, this.options.duration) * 1000) / 1000;
				if (middle == this.cancelRemaining)
				{
					this.startMilliseconds -= half;
					found = true;
				}
				if (middle < this.cancelRemaining)
				{
					stopTime = half;
					stop = middle;
				}
				else
				{
					startTime = half;
					start = middle;
				}
			}
		}
		this.cancelRemaining = 0;
	}
	this.notifyObservers('onPreEffect', this);

	if (withoutTimer == false)
	{
		var self = this;
		this.timer = setInterval(function() { self.drawEffect(); }, this.options.interval);
	}
	this.isRunning = true;
};
Spry.Effect.Animator.prototype.stopFlagReset = function()
{
	if (this.timer)
	{
		clearInterval(this.timer);
		this.timer = null;
	}
	this.startMilliseconds = 0;
};
Spry.Effect.Animator.prototype.stop = function()
{
	this.stopFlagReset();
	this.notifyObservers('onPostEffect', this);
	this.isRunning = false;
};

Spry.Effect.Animator.prototype.cancel = function()
{
	var elapsed = this.getElapsedMilliseconds();
	if (this.startMilliseconds > 0 && elapsed < this.options.duration)
		this.cancelRemaining = this.options.transition(elapsed, 0, 1, this.options.duration);

	this.stopFlagReset();
	this.notifyObservers('onCancel', this);
	this.isRunning = false;
};

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

	this.notifyObservers('onStep', this);
	var timeElapsed = this.getElapsedMilliseconds();

	if (typeof this.options.transition != 'function'){
		Spry.Effect.Utils.showError('unknown transition');
		return;
	}
	this.animate();

	if (timeElapsed > this.options.duration)
	{
		isRunning = false;
		this.stop();
	}
	return isRunning;
};

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

Spry.Effect.Animator.prototype.doToggle = function()
{
	if (!this.direction)
	{
		this.direction = Spry.forwards;
		return;
	}
	if (this.options.toggle == true)
	{
		if (this.direction == Spry.forwards)
		{
			this.direction = Spry.backwards;
			this.notifyObservers('onToggle', this);
		} 
		else if (this.direction == Spry.backwards)
		{
			this.direction = Spry.forwards;
		}
	}
}

Spry.Effect.Animator.prototype.prepareStart = function()
{
		if (this.options && this.options.toggle)
			this.doToggle();
};

Spry.Effect.Animator.prototype.animate = function(){};
Spry.Effect.Animator.prototype.onStep = function(el)
{
	if (el != this)
		this.notifyObservers('onStep', this);
};

//////////////////////////////////////////////////////////////////////
//
// 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);
	if (!this.element)
		return;

 	// 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.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()
{
	var opacity = 0;
	var elapsed = this.getElapsedMilliseconds();
	if (this.direction == Spry.forwards) 
		opacity = this.options.transition(elapsed, this.startOpacity, this.stopOpacity - this.startOpacity, this.options.duration);
	else if (this.direction == Spry.backwards) 
		opacity = this.options.transition(elapsed, this.stopOpacity, this.startOpacity - this.stopOpacity, this.options.duration);

	if(/MSIE/.test(navigator.userAgent))
	{
		var tmpval = Spry.Effect.getStyleProp(this.element,'filter');

if (tmpval){
			tmpval = tmpval.replace(/alpha\(opacity=[0-9]{1,3}\)/g, '');
		}
		this.element.style.filter = tmpval + "alpha(opacity=" + Math.floor(opacity * 100) + ")";
	}
	else
		this.element.style.opacity = opacity;

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

Spry.Effect.Opacity.prototype.prepareStart = function()
{
	if (this.options && this.options.toggle)
		this.doToggle();	

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

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

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

	this.name = 'Cluster';
	this.effectsArray = new Array();
	this.currIdx = -1;
	var _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.setInterval = function(interval){
	var l = this.effectsArray.length;
	this.options.interval = interval;
	for (var i = 0; i < l; i++)
	{
		this.effectsArray[i].effect.setInterval(interval);
	}
};
Spry.Effect.Cluster.prototype.drawEffect = function()
{
	var isRunning = true;
	var allEffectsDidRun = false;
	var baseEffectIsStillRunning = false;
	var evalNextEffectsRunning = false;

	if ((this.currIdx == -1 && this.direction == Spry.forwards) || (this.currIdx == this.effectsArray.length && this.direction == Spry.backwards))
		this.initNextEffectsRunning();

	var start = this.direction == Spry.forwards ? 0 : this.effectsArray.length-1;
	var stop = this.direction == Spry.forwards ? this.effectsArray.length : -1;
	var step = this.direction == Spry.forwards ? 1 : -1;
	for (var i = start; i != stop; i+=step)
	{
		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 = this.direction == Spry.forwards ? this.effectsArray.length: -1;
	}
	return isRunning;
};

Spry.Effect.Cluster.prototype.initNextEffectsRunning = function()
{
	var allEffectsDidRun = false;
	var step = this.direction == Spry.forwards ? 1 : -1;
	var stop = this.direction == Spry.forwards ? this.effectsArray.length : -1;
	this.currIdx+=step;
	if ( (this.currIdx > (this.effectsArray.length - 1) && this.direction == Spry.forwards) || (this.currIdx < 0 && this.direction == Spry.backwards))
		allEffectsDidRun = true;
	else
		for (var i = this.currIdx; i != stop; i+=step)
		{
			if ((i > this.currIdx && this.direction == Spry.forwards || i < this.currIdx && this.direction == Spry.backwards) && 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.toggleCluster = function()
{
	if (!this.direction)
	{
		this.direction = Spry.forwards;
		return;
	}

	if (this.options.toggle == true)
	{
		if (this.direction == Spry.forwards)
		{
			this.direction = Spry.backwards;
			this.notifyObservers('onToggle', this);
			this.currIdx = this.effectsArray.length;
		}
		else if (this.direction == Spry.backwards)
		{
			this.direction = Spry.forwards;
			this.currIdx = -1;
		}
	}
	else
	{
		if (this.direction == Spry.forwards)
			this.currIdx = -1;
		else if (this.direction == Spry.backwards)
			this.currIdx = this.effectsArray.length;
	}
};

Spry.Effect.Cluster.prototype.doToggle = function()
{
	this.toggleCluster();

	// 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++)
		if (this.effectsArray[i].effect.isRunning)
			this.effectsArray[i].effect.cancel();
	
	var elapsed = this.getElapsedMilliseconds();
	if (this.startMilliseconds > 0 && elapsed < this.options.duration)
		this.cancelRemaining = this.options.transition(elapsed, 0, 1, this.options.duration);
	this.stopFlagReset();
	this.notifyObservers('onCancel', this);
	this.isRunning = false;
};

Spry.Effect.Cluster.prototype.addNextEffect = function(effect)
{
	effect.addObserver(this);
	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)
{
	if (this.effectsArray.length == 0 || this.effectsArray[this.effectsArray.length-1].kind != 'parallel')
		effect.addObserver(this);

	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;
	}
};

Spry.Effect.Cluster.prototype.prepareStart = function()
{
	this.toggleCluster();
};

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

Spry.Effect.Fade = function (element, options) 
{
	if (!this.notStaticAnimator)
		return Spry.Effect.Utils.showInitError('Fade');

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

	this.name = 'Fade';
	var element = Spry.Effect.getElement(element);
	this.element = element;
	if (!this.element)
		return;
	var durationInMilliseconds = 1000;
	var fromOpacity = 0.0;
	var toOpacity = 100.0;
	var doToggle = false;
	var transition = Spry.fifthTransition;
	var fps = 60;
	var originalOpacity = 0;
	if(/MSIE/.test(navigator.userAgent))
		originalOpacity = parseInt(Spry.Effect.getStylePropRegardlessOfDisplayState(this.element, 'filter').replace(/alpha\(opacity=([0-9]{1,3})\)/g, '$1'), 10);
	else
		originalOpacity = parseInt(Spry.Effect.getStylePropRegardlessOfDisplayState(this.element, 'opacity') * 100, 10);

	if (isNaN(originalOpacity))
		originalOpacity = 100;

	if (options)
	{
		if (options.duration != null) durationInMilliseconds = options.duration;
		if (options.from != null){
			if (Spry.Effect.Utils.isPercentValue(options.from))
				fromOpacity = Spry.Effect.Utils.getPercentValue(options.from) * originalOpacity / 100;
			else
				fromOpacity = options.from;
		}
		if (options.to != null)
		{	
			if (Spry.Effect.Utils.isPercentValue(options.to))
				toOpacity = Spry.Effect.Utils.getPercentValue(options.to) * originalOpacity / 100;
			else
				toOpacity = options.to;
		}
		if (options.toggle != null) doToggle = options.toggle;
		if (options.transition != null) transition = options.transition;
		if (options.fps != null) fps = options.fps;
		else this.options.transition = transition;
	}

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

	options = {duration: durationInMilliseconds, toggle: doToggle, transition: transition, from: fromOpacity, to: toOpacity, fps: fps};
	var fadeEffect = new Spry.Effect.Opacity(element, fromOpacity, toOpacity, options);
	this.addNextEffect(fadeEffect);
};

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