// script.aculo.us effects.js v1.6.5, Wed Nov 08 14:17:49 CET 2006

// Copyright (c) 2005, 2006 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// Contributors:
// Justin Palmer (http://encytemedia.com/)
// Mark Pilgrim (http://diveintomark.org/)
// Martin Bialasinki
//
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/

// converts rgb() and #xxx to #xxxxxx format,
// returns self (or first argument) if not convertable

String.prototype.parseColor = function() {
	var color = '#';
	if(this.slice(0,4) == 'rgb(') {
	var cols = this.slice(4,this.length-1).split(',');
	var i=0; do { color += parseInt(cols[i]).toColorPart() } while (++i<3);
	}else{
		if(this.slice(0,1) == '#') {
			if(this.length==4) for(var i=1;i<4;i++) color += (this.charAt(i) + this.charAt(i)).toLowerCase();
			if(this.length==7) color = this.toLowerCase();
		}
	}
	return(color.length==7 ? color : (arguments[0] || this));
}

/*---------------------------*/

Element.collectTextNodes = function(element) {
	return $A($(element).childNodes).collect( function(node) {
	return (node.nodeType==3 ? node.nodeValue :
		(node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
	}).flatten().join('');
}

Element.collectTextNodesIgnoreClass = function(element, className) {
	return $A($(element).childNodes).collect( function(node) {
	return (node.nodeType==3 ? node.nodeValue :
		((node.hasChildNodes() && !Element.hasClassName(node,className)) ?
		Element.collectTextNodesIgnoreClass(node, className) : ''));
	}).flatten().join('');
}

Element.setContentZoom = function(element, percent) {
	element = $(element);
	element.setStyle({fontSize: (percent/100) + 'em'});
	if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
	return element;
}

Element.getOpacity = function(element){
	element = $(element);
	var opacity;
	if (opacity = element.getStyle('opacity'))
	return parseFloat(opacity);
	if (opacity = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
	if(opacity[1]) return parseFloat(opacity[1]) / 100;
	return 1.0;
}

Element.setOpacity = function(element, value){
	element= $(element);
	if (value == 1){
	element.setStyle({ opacity:
		(/Gecko/.test(navigator.userAgent) && !/Konqueror|Safari|KHTML/.test(navigator.userAgent)) ?
		0.999999 : 1.0 });
	if(/MSIE/.test(navigator.userAgent) && !window.opera)
		element.setStyle({filter: Element.getStyle(element,'filter').replace(/alpha\([^\)]*\)/gi,'')});
	} else {
	if(value < 0.00001) value = 0;
	element.setStyle({opacity: value});
	if(/MSIE/.test(navigator.userAgent) && !window.opera)
		element.setStyle(
		{ filter: element.getStyle('filter').replace(/alpha\([^\)]*\)/gi,'') +
			'alpha(opacity='+value*100+')' });
	}
	return element;
}

Element.getInlineOpacity = function(element){
	return $(element).style.opacity || '';
}

Element.forceRerendering = function(element) {
	try {
	element = $(element);
	var n = document.createTextNode(' ');
	element.appendChild(n);
	element.removeChild(n);
	} catch(e) { }
};

/*---------------------------*/

Array.prototype.call = function() {
	var args = arguments;
	this.each(function(f){ f.apply(this, args) });
}

/*---------------------------*/

var Effect = {
	_elementDoesNotExistError: {
		name: 'ElementDoesNotExistError',
		message: 'The specified DOM element does not exist, but is required for this effect to operate'
	},
	tagifyText: function(element) {
		if(typeof Builder == 'undefined')
		throw("Effect.tagifyText requires including script.aculo.us' builder.js library");

		var tagifyStyle = 'position:relative';
		if(/MSIE/.test(navigator.userAgent) && !window.opera) tagifyStyle += ';zoom:1';

		element = $(element);
		$A(element.childNodes).each( function(child) {
			if(child.nodeType==3) {
				child.nodeValue.toArray().each( function(character) {
					element.insertBefore(
						Builder.node('span',{style: tagifyStyle},
						character == ' ' ? String.fromCharCode(160) : character), 
						child
					);
				});
				Element.remove(child);
			}
		});
	},
multiple: function(element, effect) {
		var elements;
		if(((typeof element == 'object') || 
			(typeof element == 'function')) && 
		(element.length))
		elements = element;
	else
		elements = $(element).childNodes;

	var options = Object.extend({
		speed: 0.1,
		delay: 0.0
	}, arguments[2] || {});
	var masterDelay = options.delay;

	$A(elements).each( function(element, index) {
		new effect(element, Object.extend(options, { delay: index * options.speed + masterDelay }));
	});
},
	PAIRS: {
		'slide': ['SlideDown','SlideUp'],
		'blind': ['BlindDown','BlindUp'],
		'appear': ['Appear','Fade']
	},

	toggle: function(element, effect) {
		element = $(element);
		effect = (effect || 'appear').toLowerCase();
		var options = Object.extend({
			queue: { position:'end', scope:(element.id || 'global'), limit: 1 }
		}, arguments[2] || {});
		Effect[element.visible() ? 
		Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
	}
};

var Effect2 = Effect; // deprecated

/* ------------- transitions ------------- */

Effect.Transitions = {
	linear: Prototype.K,
	sinoidal: function(pos) {
	return (-Math.cos(pos*Math.PI)/2) + 0.5;
	},
	reverse: function(pos) {
	return 1-pos;
	},
	flicker: function(pos) {
	return ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
	},
	wobble: function(pos) {
	return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
	},
	pulse: function(pos, pulses) {
	pulses = pulses || 5; 
	return (
		Math.round((pos % (1/pulses)) * pulses) == 0 ? 
			((pos * pulses * 2) - Math.floor(pos * pulses * 2)) :
		1 - ((pos * pulses * 2) - Math.floor(pos * pulses * 2))
		);
	},
	none: function(pos) {
		return 0;
	},
	full: function(pos) {
		return 1;
	}
};

/* ------------- core effects ------------- */

Effect.ScopedQueue = Class.create();
Object.extend(Object.extend(Effect.ScopedQueue.prototype, Enumerable), {
	initialize: function() {
		this.effects = [];
		this.interval = null;
	},
	_each: function(iterator) {
		this.effects._each(iterator);
	},
	add: function(effect) {
		var timestamp = new Date().getTime();
	
		var position = (typeof effect.options.queue == 'string') ? 
		effect.options.queue : effect.options.queue.position;
	
		switch(position) {
			case 'front':
				// move unstarted effects after this effect
				this.effects.findAll(function(e){ return e.state=='idle' }).each( function(e) {
					e.startOn += effect.finishOn;
					e.finishOn += effect.finishOn;
				});
				break;
			case 'with-last':
				timestamp = this.effects.pluck('startOn').max() || timestamp;
			break;
			case 'end':
			// start effect after last queued effect has finished
			timestamp = this.effects.pluck('finishOn').max() || timestamp;
			break;
		}
	
		effect.startOn += timestamp;
		effect.finishOn += timestamp;

		if(!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit))
		this.effects.push(effect);
	
		if(!this.interval) 
		this.interval = setInterval(this.loop.bind(this), 40);
	},

	remove: function(effect) {
		this.effects = this.effects.reject(function(e) { return e==effect });
		if(this.effects.length == 0) {
			clearInterval(this.interval);
			this.interval = null;
		}
	},
	loop: function() {
		var timePos = new Date().getTime();
		this.effects.invoke('loop', timePos);
	}
});

Effect.Queues = {
	instances: $H(),
	get: function(queueName) {
		if(typeof queueName != 'string') return queueName;
	
		if(!this.instances[queueName])
		this.instances[queueName] = new Effect.ScopedQueue();
		return this.instances[queueName];
	}
}
Effect.Queue = Effect.Queues.get('global');

Effect.DefaultOptions = {
	transition: Effect.Transitions.sinoidal,
	duration: 1.0,	 // seconds
	fps: 25.0,	// max. 25fps due to Effect.Queue implementation
	sync: false, // true for combining
	from: 0.0,
	to: 1.0,
	delay: 0.0,
	queue: 'parallel'
}

Effect.Base = function() {};
Effect.Base.prototype = {
	position: null,
	start: function(options) {
		this.options = Object.extend(Object.extend({},Effect.DefaultOptions), options || {});
		this.currentFrame = 0;
		this.state = 'idle';
		this.startOn = this.options.delay*1000;
		this.finishOn = this.startOn + (this.options.duration*1000);
		this.event('beforeStart');
		if(!this.options.sync)
		Effect.Queues.get(typeof this.options.queue == 'string' ? 
		'global' : this.options.queue.scope).add(this);
	},
	loop: function(timePos) {
		if(timePos >= this.startOn) {
			if(timePos >= this.finishOn) {
				this.render(1.0);
				this.cancel();
				this.event('beforeFinish');
				if(this.finish) this.finish();
				this.event('afterFinish');
				return;
			}
			var pos = (timePos - this.startOn) / (this.finishOn - this.startOn);
			var frame = Math.round(pos * this.options.fps * this.options.duration);
			if(frame > this.currentFrame) {
				this.render(pos);
				this.currentFrame = frame;
			}
		}
	},

	render: function(pos) {
		if(this.state == 'idle') {
			this.state = 'running';
			this.event('beforeSetup');
			if(this.setup) this.setup();
			this.event('afterSetup');
		}
		if(this.state == 'running') {
			if(this.options.transition) pos = this.options.transition(pos);
			pos *= (this.options.to-this.options.from);
			pos += this.options.from;
			this.position = pos;
			this.event('beforeUpdate');
			if(this.update) this.update(pos);
			this.event('afterUpdate');
		}
	},
	cancel: function() {
		if(!this.options.sync) 
		Effect.Queues.get(typeof this.options.queue == 'string' ? 
		'global' : this.options.queue.scope).remove(this);
		this.state = 'finished';
	},
	event: function(eventName) {
		if(this.options[eventName + 'Internal']) this.options[eventName + 'Internal'](this);
		if(this.options[eventName]) this.options[eventName](this);
	},
	inspect: function() {
		return '#<Effect:' + $H(this).inspect() + ',options:' + $H(this.options).inspect() + '>';
	}
}

Effect.Parallel = Class.create();
Object.extend(Object.extend(Effect.Parallel.prototype, Effect.Base.prototype), {
	initialize: function(effects) {
		this.effects = effects || [];
		this.start(arguments[1]);
	},
	update: function(position) {
		this.effects.invoke('render', position);
	},
	finish: function(position) {
		this.effects.each( function(effect) {
			effect.render(1.0);
			effect.cancel();
			effect.event('beforeFinish');
			if(effect.finish) effect.finish(position);
			effect.event('afterFinish');
		});
	}
});

Effect.Event = Class.create();
Object.extend(Object.extend(Effect.Event.prototype, Effect.Base.prototype), {
	initialize: function() {
		var options = Object.extend({
			duration: 0
		}, arguments[0] || {});
		this.start(options);
	},
	update: Prototype.emptyFunction
});

Effect.Opacity = Class.create();
Object.extend(Object.extend(Effect.Opacity.prototype, Effect.Base.prototype), {
	initialize: function(element) {
		this.element = $(element);
		if(!this.element) throw(Effect._elementDoesNotExistError);
		// make this work on IE on elements without 'layout'
		if(/MSIE/.test(navigator.userAgent) && !window.opera && (!this.element.currentStyle.hasLayout))
		this.element.setStyle({zoom: 1});
		var options = Object.extend({
			from: this.element.getOpacity() || 0.0,
			to: 1.0
		}, arguments[1] || {});
		this.start(options);
	},
	update: function(position) {
		this.element.setOpacity(position);
	}
});

Effect.Move = Class.create();
Object.extend(Object.extend(Effect.Move.prototype, Effect.Base.prototype), {
	initialize: function(element) {
		this.element = $(element);
		if(!this.element) throw(Effect._elementDoesNotExistError);
		var options = Object.extend({
			 x: 0,
			 y: 0,
			 mode: 'relative'
		}, arguments[1] || {});
		this.start(options);
	},
	setup: function() {
	// Bug in Opera: Opera returns the "real" position of a static element or
	// relative element that does not have top/left explicitly set.
	// ==> Always set top and left for position relative elements in your stylesheets 
	// (to 0 if you do not need them) 
	this.element.makePositioned();
	this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
	this.originalTop = parseFloat(this.element.getStyle('top') || '0');
	if(this.options.mode == 'absolute') {
	 // absolute movement, so we need to calc deltaX and deltaY
	 this.options.x = this.options.x - this.originalLeft;
	 this.options.y = this.options.y - this.originalTop;
	}
	},
	update: function(position) {
	this.element.setStyle({
	 left: Math.round(this.options.x * position + this.originalLeft) + 'px',
	 top: Math.round(this.options.y * position + this.originalTop) + 'px'
	});
	}
});

// for backwards compatibility
Effect.MoveBy = function(element, toTop, toLeft) {
	return new Effect.Move(element, 
	Object.extend({ x: toLeft, y: toTop }, arguments[3] || {}));
};

Effect.Scale = Class.create();
Object.extend(Object.extend(Effect.Scale.prototype, Effect.Base.prototype), {
	initialize: function(element, percent) {
	this.element = $(element);
	if(!this.element) throw(Effect._elementDoesNotExistError);
	var options = Object.extend({
	 scaleX: true,
	 scaleY: true,
	 scaleContent: true,
	 scaleFromCenter: false,
	 scaleMode: 'box', // 'box' or 'contents' or {} with provided values
	 scaleFrom: 100.0,
	 scaleTo: percent
	}, arguments[2] || {});
	this.start(options);
},

setup: function() {
	this.restoreAfterFinish = this.options.restoreAfterFinish || false;
	this.elementPositioning = this.element.getStyle('position');

	this.originalStyle = {};
	['top','left','width','height','fontSize'].each( function(k) {
	 this.originalStyle[k] = this.element.style[k];
	}.bind(this));

	this.originalTop = this.element.offsetTop;
	this.originalLeft = this.element.offsetLeft;

	var fontSize = this.element.getStyle('font-size') || '100%';
	['em','px','%','pt'].each( function(fontSizeType) {
		if(fontSize.indexOf(fontSizeType)>0) {
		this.fontSize	 = parseFloat(fontSize);
		this.fontSizeType = fontSizeType;
		}
	}.bind(this));

	this.factor = (this.options.scaleTo - this.options.scaleFrom)/100;

	this.dims = null;
	if(this.options.scaleMode=='box')
		this.dims = [this.element.offsetHeight, this.element.offsetWidth];
	if(/^content/.test(this.options.scaleMode))
		this.dims = [this.element.scrollHeight, this.element.scrollWidth];
	if(!this.dims)
		this.dims = [this.options.scaleMode.originalHeight,
		this.options.scaleMode.originalWidth];
},
update: function(position) {
	var currentScale = (this.options.scaleFrom/100.0) + (this.factor * position);
	if(this.options.scaleContent && this.fontSize)
		this.element.setStyle({fontSize: this.fontSize * currentScale + this.fontSizeType });
		this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
},
finish: function(position) {
	if(this.restoreAfterFinish) this.element.setStyle(this.originalStyle);
},
	setDimensions: function(height, width) {
	var d = {};
	if(this.options.scaleX) d.width = Math.round(width) + 'px';
	if(this.options.scaleY) d.height = Math.round(height) + 'px';
	if(this.options.scaleFromCenter) {
		var topd = (height - this.dims[0])/2;
		var leftd = (width - this.dims[1])/2;
		if(this.elementPositioning == 'absolute') {
			if(this.options.scaleY) d.top = this.originalTop-topd + 'px';
			if(this.options.scaleX) d.left = this.originalLeft-leftd + 'px';
		}else{
			if(this.options.scaleY) d.top = -topd + 'px';
			if(this.options.scaleX) d.left = -leftd + 'px';
		}
	}
	this.element.setStyle(d);
	}
});

Effect.Highlight = Class.create();
Object.extend(Object.extend(Effect.Highlight.prototype, Effect.Base.prototype), {
	initialize: function(element) {
	this.element = $(element);
	if(!this.element) throw(Effect._elementDoesNotExistError);
	var options = Object.extend({ startcolor: '#ffff99' }, arguments[1] || {});
	this.start(options);
	},
	setup: function() {
	// Prevent executing on elements not in the layout flow
	if(this.element.getStyle('display')=='none') { this.cancel(); return; }
	// Disable background image during the effect
	this.oldStyle = {
		backgroundImage: this.element.getStyle('background-image') };
	this.element.setStyle({backgroundImage: 'none'});
	if(!this.options.endcolor)
		this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
	if(!this.options.restorecolor)
		this.options.restorecolor = this.element.getStyle('background-color');
	// init color calculations
	this._base = $R(0,2).map(function(i){ return parseInt(this.options.startcolor.slice(i*2+1,i*2+3),16) }.bind(this));
	this._delta = $R(0,2).map(function(i){ return parseInt(this.options.endcolor.slice(i*2+1,i*2+3),16)-this._base[i] }.bind(this));
},
	update: function(position) {
	this.element.setStyle({backgroundColor: $R(0,2).inject('#',function(m,v,i){
		return m+(Math.round(this._base[i]+(this._delta[i]*position)).toColorPart()); }.bind(this)) });
	},
	finish: function() {
	this.element.setStyle(Object.extend(this.oldStyle, {
		backgroundColor: this.options.restorecolor
	}));
	}
});

Effect.ScrollTo = Class.create();
Object.extend(Object.extend(Effect.ScrollTo.prototype, Effect.Base.prototype), {
	initialize: function(element) {
	this.element = $(element);
	this.start(arguments[1] || {});
	},
	setup: function() {
	Position.prepare();
	var offsets = Position.cumulativeOffset(this.element);
	if(this.options.offset) offsets[1] += this.options.offset;
	var max = window.innerHeight ? 
		window.height - window.innerHeight :
		document.body.scrollHeight - 
		(document.documentElement.clientHeight ? 
			document.documentElement.clientHeight : document.body.clientHeight);
	this.scrollStart = Position.deltaY;
	this.delta = (offsets[1] > max ? max : offsets[1]) - this.scrollStart;
	},
	update: function(position) {
	Position.prepare();
	window.scrollTo(Position.deltaX, 
		this.scrollStart + (position*this.delta));
	}
});

/* ------------- combination effects ------------- */

Effect.Fade = function(element) {
	element = $(element);
	var oldOpacity = element.getInlineOpacity();
	var options = Object.extend({
	from: element.getOpacity() || 1.0,
	to: 0.0,
	afterFinishInternal: function(effect) { 
	if(effect.options.to!=0) return;
	effect.element.hide().setStyle({opacity: oldOpacity}); 
	}}, arguments[1] || {});
	return new Effect.Opacity(element,options);
}

Effect.Appear = function(element) {
	element = $(element);
	var options = Object.extend({
	from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
	to: 1.0,
	// force Safari to render floated elements properly
	afterFinishInternal: function(effect) {
	effect.element.forceRerendering();
	},
	beforeSetup: function(effect) {
	effect.element.setOpacity(effect.options.from).show(); 
	}}, arguments[1] || {});
	return new Effect.Opacity(element,options);
}

Effect.Puff = function(element) {
	element = $(element);
	var oldStyle = {
	opacity: element.getInlineOpacity(), 
	position: element.getStyle('position'),
	top: element.style.top,
	left: element.style.left,
	width: element.style.width,
	height: element.style.height
	};
	return new Effect.Parallel(
	[ new Effect.Scale(element, 200, 
		{ sync: true, scaleFromCenter: true, scaleContent: true, restoreAfterFinish: true }), 
	 new Effect.Opacity(element, { sync: true, to: 0.0 } ) ], 
		Object.extend({ duration: 1.0, 
			beforeSetupInternal: function(effect) {
				Position.absolutize(effect.effects[0].element)
			},
			afterFinishInternal: function(effect) {
			effect.effects[0].element.hide().setStyle(oldStyle); }
		}, arguments[1] || {})
	);
}

Effect.BlindUp = function(element) {
 element = $(element);
 element.makeClipping();
 return new Effect.Scale(element, 0,
	Object.extend({ scaleContent: false, 
	 scaleX: false, 
	 restoreAfterFinish: true,
	 afterFinishInternal: function(effect) {
		effect.element.hide().undoClipping();
	 } 
	}, arguments[1] || {})
 );
}

Effect.BlindDown = function(element) {
 element = $(element);
 var elementDimensions = element.getDimensions();
 return new Effect.Scale(element, 100, Object.extend({ 
	scaleContent: false, 
	scaleX: false,
	scaleFrom: 0,
	scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
	restoreAfterFinish: true,
	afterSetup: function(effect) {
	 effect.element.makeClipping().setStyle({height: '0px'}).show(); 
	}, 
	afterFinishInternal: function(effect) {
	 effect.element.undoClipping();
	}
 }, arguments[1] || {}));
}

Effect.SwitchOff = function(element) {
 element = $(element);
 var oldOpacity = element.getInlineOpacity();
 return new Effect.Appear(element, Object.extend({
	duration: 0.4,
	from: 0,
	transition: Effect.Transitions.flicker,
	afterFinishInternal: function(effect) {
	 new Effect.Scale(effect.element, 1, { 
		duration: 0.3, scaleFromCenter: true,
		scaleX: false, scaleContent: false, restoreAfterFinish: true,
		beforeSetup: function(effect) { 
		 effect.element.makePositioned().makeClipping();
		},
		afterFinishInternal: function(effect) {
		 effect.element.hide().undoClipping().undoPositioned().setStyle({opacity: oldOpacity});
		}
	 })
	}
 }, arguments[1] || {}));
}

Effect.DropOut = function(element) {
 element = $(element);
 var oldStyle = {
	top: element.getStyle('top'),
	left: element.getStyle('left'),
	opacity: element.getInlineOpacity() };
 return new Effect.Parallel(
	[ new Effect.Move(element, {x: 0, y: 100, sync: true }), 
	 new Effect.Opacity(element, { sync: true, to: 0.0 }) ],
	Object.extend(
	 { duration: 0.5,
		beforeSetup: function(effect) {
		 effect.effects[0].element.makePositioned(); 
		},
		afterFinishInternal: function(effect) {
		 effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
		} 
	 }, arguments[1] || {}));
}

Effect.Shake = function(element) {
 element = $(element);
 var oldStyle = {
	top: element.getStyle('top'),
	left: element.getStyle('left') };
	return new Effect.Move(element, 
	 { x: 20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	 { x: -40, y: 0, duration: 0.1, afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	 { x: 40, y: 0, duration: 0.1, afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	 { x: -40, y: 0, duration: 0.1, afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	 { x: 40, y: 0, duration: 0.1, afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	 { x: -20, y: 0, duration: 0.05, afterFinishInternal: function(effect) {
		effect.element.undoPositioned().setStyle(oldStyle);
 }}) }}) }}) }}) }}) }});
}

Effect.SlideDown = function(element) {
 element = $(element).cleanWhitespace();
 // SlideDown need to have the content of the element wrapped in a container element with fixed height!
 var oldInnerBottom = element.down().getStyle('bottom');
 var elementDimensions = element.getDimensions();
 return new Effect.Scale(element, 100, Object.extend({ 
	scaleContent: false, 
	scaleX: false, 
	scaleFrom: window.opera ? 0 : 1,
	scaleMode: {originalHeight: elementDimensions.height, originalWidth: elementDimensions.width},
	restoreAfterFinish: true,
	afterSetup: function(effect) {
	 effect.element.makePositioned();
	 effect.element.down().makePositioned();
	 if(window.opera) effect.element.setStyle({top: ''});
	 effect.element.makeClipping().setStyle({height: '0px'}).show(); 
	},
	afterUpdateInternal: function(effect) {
	 effect.element.down().setStyle({bottom:
		(effect.dims[0] - effect.element.clientHeight) + 'px' }); 
	},
	afterFinishInternal: function(effect) {
	 effect.element.undoClipping().undoPositioned();
	 effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom}); }
	}, arguments[1] || {})
 );
}

Effect.SlideUp = function(element) {
 element = $(element).cleanWhitespace();
 var oldInnerBottom = element.down().getStyle('bottom');
 return new Effect.Scale(element, window.opera ? 0 : 1,
	Object.extend({ scaleContent: false, 
	scaleX: false, 
	scaleMode: 'box',
	scaleFrom: 100,
	restoreAfterFinish: true,
	beforeStartInternal: function(effect) {
	 effect.element.makePositioned();
	 effect.element.down().makePositioned();
	 if(window.opera) effect.element.setStyle({top: ''});
	 effect.element.makeClipping().show();
	}, 
	afterUpdateInternal: function(effect) {
	 effect.element.down().setStyle({bottom:
		(effect.dims[0] - effect.element.clientHeight) + 'px' });
	},
	afterFinishInternal: function(effect) {
	 effect.element.hide().undoClipping().undoPositioned().setStyle({bottom: oldInnerBottom});
	 effect.element.down().undoPositioned();
	}
	}, arguments[1] || {})
 );
}

// Bug in opera makes the TD containing this element expand for a instance after finish 
Effect.Squish = function(element) {
 return new Effect.Scale(element, window.opera ? 1 : 0, { 
	restoreAfterFinish: true,
	beforeSetup: function(effect) {
	 effect.element.makeClipping(); 
	}, 
	afterFinishInternal: function(effect) {
	 effect.element.hide().undoClipping(); 
	}
 });
}

Effect.Grow = function(element) {
 element = $(element);
 var options = Object.extend({
	direction: 'center',
	moveTransition: Effect.Transitions.sinoidal,
	scaleTransition: Effect.Transitions.sinoidal,
	opacityTransition: Effect.Transitions.full
 }, arguments[1] || {});
 var oldStyle = {
	top: element.style.top,
	left: element.style.left,
	height: element.style.height,
	width: element.style.width,
	opacity: element.getInlineOpacity() };

 var dims = element.getDimensions();	
 var initialMoveX, initialMoveY;
 var moveX, moveY;
 
	switch (options.direction) {
		case 'top-left':
			initialMoveX = initialMoveY = moveX = moveY = 0; 
		break;
		case 'top-right':
			initialMoveX = dims.width;
			initialMoveY = moveY = 0;
			moveX = -dims.width;
		break;
		case 'bottom-left':
			initialMoveX = moveX = 0;
			initialMoveY = dims.height;
			moveY = -dims.height;
		break;
		case 'bottom-right':
			initialMoveX = dims.width;
			initialMoveY = dims.height;
			moveX = -dims.width;
			moveY = -dims.height;
		break;
		case 'center':
			initialMoveX = dims.width / 2;
			initialMoveY = dims.height / 2;
			moveX = -dims.width / 2;
			moveY = -dims.height / 2;
		break;
	}

	return new Effect.Move(element, {
		x: initialMoveX,
		y: initialMoveY,
		duration: 0.01, 
		beforeSetup: function(effect) {
			effect.element.hide().makeClipping().makePositioned();
		},
		afterFinishInternal: function(effect) {
			new Effect.Parallel(
				[ new Effect.Opacity(effect.element, { sync: true, to: 1.0, from: 0.0, transition: options.opacityTransition }),
				new Effect.Move(effect.element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition }),
				new Effect.Scale(effect.element, 100, {
				scaleMode: { originalHeight: dims.height, originalWidth: dims.width }, 
				sync: true, scaleFrom: window.opera ? 1 : 0, transition: options.scaleTransition, restoreAfterFinish: true})
				], Object.extend({
					beforeSetup: function(effect) {
						effect.effects[0].element.setStyle({height: '0px'}).show(); 
					},
					afterFinishInternal: function(effect) {
						effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle); 
					}
				}, options)
			)
		}
	});
}

Effect.Shrink = function(element) {
 element = $(element);
	var options = Object.extend({
	direction: 'center',
	moveTransition: Effect.Transitions.sinoidal,
	scaleTransition: Effect.Transitions.sinoidal,
	opacityTransition: Effect.Transitions.none
 }, arguments[1] || {});
	var oldStyle = {
	top: element.style.top,
	left: element.style.left,
	height: element.style.height,
	width: element.style.width,
	opacity: element.getInlineOpacity() };

 var dims = element.getDimensions();
 var moveX, moveY;
 
 switch (options.direction) {
	case 'top-left':
		moveX = moveY = 0;
	break;
	case 'top-right':
		moveX = dims.width;
		moveY = 0;
	break;
	case 'bottom-left':
		moveX = 0;
		moveY = dims.height;
	break;
	case 'bottom-right':
		moveX = dims.width;
		moveY = dims.height;
	break;
	case 'center': 
		moveX = dims.width / 2;
		moveY = dims.height / 2;
	break;
 }
 
	return new Effect.Parallel(
		[ new Effect.Opacity(element, { sync: true, to: 0.0, from: 1.0, transition: options.opacityTransition }),
		 new Effect.Scale(element, window.opera ? 1 : 0, { sync: true, transition: options.scaleTransition, restoreAfterFinish: true}),
		 new Effect.Move(element, { x: moveX, y: moveY, sync: true, transition: options.moveTransition })
		], Object.extend({
				beforeStartInternal: function(effect) {
					effect.effects[0].element.makePositioned().makeClipping(); 
				},
				afterFinishInternal: function(effect) {
				effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle); }
			}, options)
	);
}

Effect.Pulsate = function(element) {
 element = $(element);
 var options = arguments[1] || {};
 var oldOpacity = element.getInlineOpacity();
 var transition = options.transition || Effect.Transitions.sinoidal;
 var reverser = function(pos){ return transition(1-Effect.Transitions.pulse(pos, options.pulses)) };
 reverser.bind(transition);
 return new Effect.Opacity(element, 
	Object.extend(Object.extend({ duration: 2.0, from: 0,
	 afterFinishInternal: function(effect) { effect.element.setStyle({opacity: oldOpacity}); }
	}, options), {transition: reverser}));
}

Effect.Fold = function(element) {
 element = $(element);
 var oldStyle = {
	top: element.style.top,
	left: element.style.left,
	width: element.style.width,
	height: element.style.height };
 element.makeClipping();
 return new Effect.Scale(element, 5, Object.extend({
	scaleContent: false,
	scaleX: false,
	afterFinishInternal: function(effect) {
	new Effect.Scale(element, 1, { 
	 scaleContent: false, 
	 scaleY: false,
	 afterFinishInternal: function(effect) {
		effect.element.hide().undoClipping().setStyle(oldStyle);
	 } });
 }}, arguments[1] || {}));
};

['setOpacity','getOpacity','getInlineOpacity','forceRerendering','setContentZoom',
 'collectTextNodes','collectTextNodesIgnoreClass'].each( 
 function(f) { Element.Methods[f] = Element[f]; }
);

Element.Methods.visualEffect = function(element, effect, options) {
 s = effect.gsub(/_/, '-').camelize();
 effect_class = s.charAt(0).toUpperCase() + s.substring(1);
 new Effect[effect_class](element, options);
 return $(element);
};

Element.addMethods();