/* Spry.Effect.js - Revision: Spry Preview Release 1.4 */

// (version 0.23)
//
// 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

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;
	}
};


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


//
// Slide Effect
//
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;
};


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