// script.aculo.us effects.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008

// Copyright (c) 2005-2007 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 (Prototype.Browser.WebKit) window.scrollBy(0,0);
  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) { }
};

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

var Effect = {
  _elementDoesNotExistError: {
	name: 'ElementDoesNotExistError',
	message: 'The specified DOM element does not exist, but is required for this effect to operate'
  },
  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) {
	  var pos = ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
	  return pos > 1 ? 1 : pos;
	},
	wobble: function(pos) {
	  return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
	},
	pulse: function(pos, pulses) {
	  pulses = pulses || 5;
	  return (
		((pos % (1/pulses)) * pulses).round() == 0 ?
			  ((pos * pulses * 2) - (pos * pulses * 2).floor()) :
		  1 - ((pos * pulses * 2) - (pos * pulses * 2).floor())
		);
	},
	spring: function(pos) {
	  return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6));
	},
	none: function(pos) {
	  return 0;
	},
	full: function(pos) {
	  return 1;
	}
  },
  DefaultOptions: {
	duration:   1.0,   // seconds
	fps:        100,   // 100= assume 66fps max.
	sync:       false, // true for combining
	from:       0.0,
	to:         1.0,
	delay:      0.0,
	queue:      'parallel'
  },
  tagifyText: function(element) {
	var tagifyStyle = 'position:relative';
	if (Prototype.Browser.IE) tagifyStyle += ';zoom:1';

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

Effect.DefaultOptions.transition = Effect.Transitions.sinoidal;

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

Effect.ScopedQueue = Class.create(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 = Object.isString(effect.options.queue) ?
	  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), 15);
  },
  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();
	for(var i=0, len=this.effects.length;i<len;i++)
	  this.effects[i] && this.effects[i].loop(timePos);
  }
});

Effect.Queues = {
  instances: $H(),
  get: function(queueName) {
	if (!Object.isString(queueName)) return queueName;

	return this.instances.get(queueName) ||
	  this.instances.set(queueName, new Effect.ScopedQueue());
  }
};
Effect.Queue = Effect.Queues.get('global');

Effect.Base = Class.create({
  position: null,
  start: function(options) {
	function codeForEvent(options,eventName){
	  return (
		(options[eventName+'Internal'] ? 'this.options.'+eventName+'Internal(this);' : '') +
		(options[eventName] ? 'this.options.'+eventName+'(this);' : '')
	  );
	}
	if (options && options.transition === false) options.transition = Effect.Transitions.linear;
	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.fromToDelta  = this.options.to-this.options.from;
	this.totalTime    = this.finishOn-this.startOn;
	this.totalFrames  = this.options.fps*this.options.duration;

	eval('this.render = function(pos){ '+
	  'if (this.state=="idle"){this.state="running";'+
	  codeForEvent(this.options,'beforeSetup')+
	  (this.setup ? 'this.setup();':'')+
	  codeForEvent(this.options,'afterSetup')+
	  '};if (this.state=="running"){'+
	  'pos=this.options.transition(pos)*'+this.fromToDelta+'+'+this.options.from+';'+
	  'this.position=pos;'+
	  codeForEvent(this.options,'beforeUpdate')+
	  (this.update ? 'this.update(pos);':'')+
	  codeForEvent(this.options,'afterUpdate')+
	  '}}');

	this.event('beforeStart');
	if (!this.options.sync)
	  Effect.Queues.get(Object.isString(this.options.queue) ?
		'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.totalTime,
		  frame = (pos * this.totalFrames).round();
	  if (frame > this.currentFrame) {
		this.render(pos);
		this.currentFrame = frame;
	  }
	}
  },
  cancel: function() {
	if (!this.options.sync)
	  Effect.Queues.get(Object.isString(this.options.queue) ?
		'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() {
	var data = $H();
	for(property in this)
	  if (!Object.isFunction(this[property])) data.set(property, this[property]);
	return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
  }
});

Effect.Parallel = Class.create(Effect.Base, {
  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.Tween = Class.create(Effect.Base, {
  initialize: function(object, from, to) {
	object = Object.isString(object) ? $(object) : object;
	var args = $A(arguments), method = args.last(),
	  options = args.length == 5 ? args[3] : null;
	this.method = Object.isFunction(method) ? method.bind(object) :
	  Object.isFunction(object[method]) ? object[method].bind(object) :
	  function(value) { object[method] = value };
	this.start(Object.extend({ from: from, to: to }, options || { }));
  },
  update: function(position) {
	this.method(position);
  }
});

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

Effect.Opacity = Class.create(Effect.Base, {
  initialize: function(element) {
	this.element = $(element);
	if (!this.element) throw(Effect._elementDoesNotExistError);
	// make this work on IE on elements without 'layout'
	if (Prototype.Browser.IE && (!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(Effect.Base, {
  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() {
	this.element.makePositioned();
	this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
	this.originalTop  = parseFloat(this.element.getStyle('top')  || '0');
	if (this.options.mode == 'absolute') {
	  this.options.x = this.options.x - this.originalLeft;
	  this.options.y = this.options.y - this.originalTop;
	}
  },
  update: function(position) {
	this.element.setStyle({
	  left: (this.options.x  * position + this.originalLeft).round() + 'px',
	  top:  (this.options.y  * position + this.originalTop).round()  + '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(Effect.Base, {
  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 = width.round() + 'px';
	if (this.options.scaleY) d.height = height.round() + '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(Effect.Base, {
  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 = { };
	if (!this.options.keepBackgroundImage) {
	  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+((this._base[i]+(this._delta[i]*position)).round().toColorPart()); }.bind(this)) });
  },
  finish: function() {
	this.element.setStyle(Object.extend(this.oldStyle, {
	  backgroundColor: this.options.restorecolor
	}));
  }
});

Effect.ScrollTo = function(element) {
  var options = arguments[1] || { },
	scrollOffsets = document.viewport.getScrollOffsets(),
	elementOffsets = $(element).cumulativeOffset(),
	max = document.viewport.getScrollOffsets[0] - document.viewport.getHeight();

  if (options.offset) elementOffsets[1] += options.offset;

  return new Effect.Tween(null,
	scrollOffsets.top,
	elementOffsets[1] > max ? max : elementOffsets[1],
	options,
	function(p){ scrollTo(scrollOffsets.left, p.round()) }
  );
};

/* ------------- 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 options = Object.extend({
	distance: 20,
	duration: 0.5
  }, arguments[1] || {});
  var distance = parseFloat(options.distance);
  var split = parseFloat(options.duration) / 10.0;
  var oldStyle = {
	top: element.getStyle('top'),
	left: element.getStyle('left') };
	return new Effect.Move(element,
	  { x:  distance, y: 0, duration: split, afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	  { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	  { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	  { x: -distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	  { x:  distance*2, y: 0, duration: split*2,  afterFinishInternal: function(effect) {
	new Effect.Move(effect.element,
	  { x: -distance, y: 0, duration: split, 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');
  var elementDimensions = element.getDimensions();
  return new Effect.Scale(element, window.opera ? 0 : 1,
   Object.extend({ scaleContent: false,
	scaleX: false,
	scaleMode: 'box',
	scaleFrom: 100,
	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().show();
	},
	afterUpdateInternal: function(effect) {
	  effect.element.down().setStyle({bottom:
		(effect.dims[0] - effect.element.clientHeight) + 'px' });
	},
	afterFinishInternal: function(effect) {
	  effect.element.hide().undoClipping().undoPositioned();
	  effect.element.down().undoPositioned().setStyle({bottom: oldInnerBottom});
	}
   }, 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] || { }));
};

Effect.Morph = Class.create(Effect.Base, {
  initialize: function(element) {
	this.element = $(element);
	if (!this.element) throw(Effect._elementDoesNotExistError);
	var options = Object.extend({
	  style: { }
	}, arguments[1] || { });

	if (!Object.isString(options.style)) this.style = $H(options.style);
	else {
	  if (options.style.include(':'))
		this.style = options.style.parseStyle();
	  else {
		this.element.addClassName(options.style);
		this.style = $H(this.element.getStyles());
		this.element.removeClassName(options.style);
		var css = this.element.getStyles();
		this.style = this.style.reject(function(style) {
		  return style.value == css[style.key];
		});
		options.afterFinishInternal = function(effect) {
		  effect.element.addClassName(effect.options.style);
		  effect.transforms.each(function(transform) {
			effect.element.style[transform.style] = '';
		  });
		}
	  }
	}
	this.start(options);
  },

  setup: function(){
	function parseColor(color){
	  if (!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
	  color = color.parseColor();
	  return $R(0,2).map(function(i){
		return parseInt( color.slice(i*2+1,i*2+3), 16 )
	  });
	}
	this.transforms = this.style.map(function(pair){
	  var property = pair[0], value = pair[1], unit = null;

	  if (value.parseColor('#zzzzzz') != '#zzzzzz') {
		value = value.parseColor();
		unit  = 'color';
	  } else if (property == 'opacity') {
		value = parseFloat(value);
		if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout))
		  this.element.setStyle({zoom: 1});
	  } else if (Element.CSS_LENGTH.test(value)) {
		  var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
		  value = parseFloat(components[1]);
		  unit = (components.length == 3) ? components[2] : null;
	  }

	  var originalValue = this.element.getStyle(property);
	  return {
		style: property.camelize(),
		originalValue: unit=='color' ? parseColor(originalValue) : parseFloat(originalValue || 0),
		targetValue: unit=='color' ? parseColor(value) : value,
		unit: unit
	  };
	}.bind(this)).reject(function(transform){
	  return (
		(transform.originalValue == transform.targetValue) ||
		(
		  transform.unit != 'color' &&
		  (isNaN(transform.originalValue) || isNaN(transform.targetValue))
		)
	  )
	});
  },
  update: function(position) {
	var style = { }, transform, i = this.transforms.length;
	while(i--)
	  style[(transform = this.transforms[i]).style] =
		transform.unit=='color' ? '#'+
		  (Math.round(transform.originalValue[0]+
			(transform.targetValue[0]-transform.originalValue[0])*position)).toColorPart() +
		  (Math.round(transform.originalValue[1]+
			(transform.targetValue[1]-transform.originalValue[1])*position)).toColorPart() +
		  (Math.round(transform.originalValue[2]+
			(transform.targetValue[2]-transform.originalValue[2])*position)).toColorPart() :
		(transform.originalValue +
		  (transform.targetValue - transform.originalValue) * position).toFixed(3) +
			(transform.unit === null ? '' : transform.unit);
	this.element.setStyle(style, true);
  }
});

Effect.Transform = Class.create({
  initialize: function(tracks){
	this.tracks  = [];
	this.options = arguments[1] || { };
	this.addTracks(tracks);
  },
  addTracks: function(tracks){
	tracks.each(function(track){
	  track = $H(track);
	  var data = track.values().first();
	  this.tracks.push($H({
		ids:     track.keys().first(),
		effect:  Effect.Morph,
		options: { style: data }
	  }));
	}.bind(this));
	return this;
  },
  play: function(){
	return new Effect.Parallel(
	  this.tracks.map(function(track){
		var ids = track.get('ids'), effect = track.get('effect'), options = track.get('options');
		var elements = [$(ids) || $$(ids)].flatten();
		return elements.map(function(e){ return new effect(e, Object.extend({ sync:true }, options)) });
	  }).flatten(),
	  this.options
	);
  }
});

Element.CSS_PROPERTIES = $w(
  'backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' +
  'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
  'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
  'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
  'fontSize fontWeight height left letterSpacing lineHeight ' +
  'marginBottom marginLeft marginRight marginTop markerOffset maxHeight '+
  'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
  'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
  'right textIndent top width wordSpacing zIndex');

Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;

String.__parseStyleElement = document.createElement('div');
String.prototype.parseStyle = function(){
  var style, styleRules = $H();
  if (Prototype.Browser.WebKit)
	style = new Element('div',{style:this}).style;
  else {
	String.__parseStyleElement.innerHTML = '<div style="' + this + '"></div>';
	style = String.__parseStyleElement.childNodes[0].style;
  }

  Element.CSS_PROPERTIES.each(function(property){
	if (style[property]) styleRules.set(property, style[property]);
  });

  if (Prototype.Browser.IE && this.include('opacity'))
	styleRules.set('opacity', this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1]);

  return styleRules;
};

if (document.defaultView && document.defaultView.getComputedStyle) {
  Element.getStyles = function(element) {
	var css = document.defaultView.getComputedStyle($(element), null);
	return Element.CSS_PROPERTIES.inject({ }, function(styles, property) {
	  styles[property] = css[property];
	  return styles;
	});
  };
} else {
  Element.getStyles = function(element) {
	element = $(element);
	var css = element.currentStyle, styles;
	styles = Element.CSS_PROPERTIES.inject({ }, function(results, property) {
	  results[property] = css[property];
	  return results;
	});
	if (!styles.opacity) styles.opacity = element.getOpacity();
	return styles;
  };
};

Effect.Methods = {
  morph: function(element, style) {
	element = $(element);
	new Effect.Morph(element, Object.extend({ style: style }, arguments[2] || { }));
	return element;
  },
  visualEffect: function(element, effect, options) {
	element = $(element)
	var s = effect.dasherize().camelize(), klass = s.charAt(0).toUpperCase() + s.substring(1);
	new Effect[klass](element, options);
	return element;
  },
  highlight: function(element, options) {
	element = $(element);
	new Effect.Highlight(element, options);
	return element;
  }
};

$w('fade appear grow shrink fold blindUp blindDown slideUp slideDown '+
  'pulsate shake puff squish switchOff dropOut').each(
  function(effect) {
	Effect.Methods[effect] = function(element, options){
	  element = $(element);
	  Effect[effect.charAt(0).toUpperCase() + effect.substring(1)](element, options);
	  return element;
	}
  }
);

$w('getInlineOpacity forceRerendering setContentZoom collectTextNodes collectTextNodesIgnoreClass getStyles').each(
  function(f) { Effect.Methods[f] = Element[f]; }
);

Element.addMethods(Effect.Methods);