// Copyright (c) 2005 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// Contributors:
//  Justin Palmer (http://encytemedia.com/)
//  Mark Pilgrim (http://diveintomark.org/)
//  Martin Bialasinki
// 
// See scriptaculous.js for full license.  

// 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(element, {fontSize: (percent/100) + 'em'});   
  if(navigator.appVersion.indexOf('AppleWebKit')>0) window.scrollBy(0,0);
}

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

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

Element.childrenWithClassName = function(element, className, findFirst) {
  var classNameRegExp = new RegExp("(^|\\s)" + className + "(\\s|$)");
  var results = $A($(element).getElementsByTagName('*'))[findFirst ? 'detect' : 'select']( function(c) { 
	return (c.className && c.className.match(classNameRegExp));
  });
  if(!results) results = [];
  return results;
}

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 = {}

Effect.Transitions.linear = Prototype.K;

Effect.Transitions.sinoidal = function(pos) {
  return (-Math.cos(pos*Math.PI)/2) + 0.5;
}
Effect.Transitions.reverse  = function(pos) {
  return 1-pos;
}
Effect.Transitions.flicker = function(pos) {
  return ((-Math.cos(pos*Math.PI)/4) + 0.75) + Math.random()/4;
}
Effect.Transitions.wobble = function(pos) {
  return (-Math.cos(pos*Math.PI*(9*pos))/2) + 0.5;
}
Effect.Transitions.pulse = function(pos) {
  return (Math.floor(pos*10) % 2 == 0 ? 
	(pos*10-Math.floor(pos*10)) : 1-(pos*10-Math.floor(pos*10)));
}
Effect.Transitions.none = function(pos) {
  return 0;
}
Effect.Transitions.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 '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.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);
  try{
  var oldOpacity = element.getInlineOpacity();
  }
  catch(e)
  {var oldOpacity = 1;}
  var options = Object.extend({
  from: element.getOpacity() || 1.0,
  to:   0.0,
  afterFinishInternal: function(effect) { 
	if(effect.options.to!=0) return;
	effect.element.hide();
	effect.element.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) {
  try{
	effect.element.forceRerendering();
	}catch(e){}
  },
  beforeSetup: function(effect) {
	effect.element.setOpacity(effect.options.from);
	effect.element.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();
		 effect.effects[0].element.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();
		effect.element.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();
	  effect.element.setStyle({height: '0px'});
	  effect.element.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();
		  effect.element.makeClipping();
		},
		afterFinishInternal: function(effect) {
		  effect.element.hide();
		  effect.element.undoClipping();
		  effect.element.undoPositioned();
		  effect.element.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();
		  effect.effects[0].element.undoPositioned();
		  effect.effects[0].element.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();
		effect.element.setStyle(oldStyle);
  }}) }}) }}) }}) }}) }});
}

Effect.SlideDown = function(element) {
  element = $(element);
  element.cleanWhitespace();
  // SlideDown need to have the content of the element wrapped in a container element with fixed height!
  var oldInnerBottom = $(element.firstChild).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.firstChild.makePositioned();
	  if(window.opera) effect.element.setStyle({top: ''});
	  effect.element.makeClipping();
	  effect.element.setStyle({height: '0px'});
	  effect.element.show(); },
	afterUpdateInternal: function(effect) {
	  effect.element.firstChild.setStyle({bottom:
		(effect.dims[0] - effect.element.clientHeight) + 'px' }); 
	},
	afterFinishInternal: function(effect) {
	  effect.element.undoClipping(); 
	  // IE will crash if child is undoPositioned first
	  if(/MSIE/.test(navigator.userAgent) && !window.opera){
		effect.element.undoPositioned();
		effect.element.firstChild.undoPositioned();
	  }else{
		effect.element.firstChild.undoPositioned();
		effect.element.undoPositioned();
	  }
	  effect.element.firstChild.setStyle({bottom: oldInnerBottom}); }
	}, arguments[1] || {})
  );
}

Effect.SlideUp = function(element) {
  element = $(element);
  element.cleanWhitespace();
  var oldInnerBottom = $(element.firstChild).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.firstChild.makePositioned();
	  if(window.opera) effect.element.setStyle({top: ''});
	  effect.element.makeClipping();
	  effect.element.show(); },  
	afterUpdateInternal: function(effect) {
	  effect.element.firstChild.setStyle({bottom:
		(effect.dims[0] - effect.element.clientHeight) + 'px' }); },
	afterFinishInternal: function(effect) {
	  effect.element.hide();
	  effect.element.undoClipping();
	  effect.element.firstChild.undoPositioned();
	  effect.element.undoPositioned();
	  effect.element.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(effect.element); },  
	  afterFinishInternal: function(effect) {
		effect.element.hide(effect.element); 
		effect.element.undoClipping(effect.element); }
  });
}

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();
	  effect.element.makeClipping();
	  effect.element.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'});
			   effect.effects[0].element.show(); 
			 },
			 afterFinishInternal: function(effect) {
			   effect.effects[0].element.undoClipping();
			   effect.effects[0].element.undoPositioned();
			   effect.effects[0].element.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();
		   effect.effects[0].element.makeClipping(); },
		 afterFinishInternal: function(effect) {
		   effect.effects[0].element.hide();
		   effect.effects[0].element.undoClipping();
		   effect.effects[0].element.undoPositioned();
		   effect.effects[0].element.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)) };
  reverser.bind(transition);
  return new Effect.Opacity(element, 
	Object.extend(Object.extend({  duration: 3.0, 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(element);
  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();
		effect.element.undoClipping(); 
		effect.element.setStyle(oldStyle);
	  } });
  }}, arguments[1] || {}));
};

['setOpacity','getOpacity','getInlineOpacity','forceRerendering','setContentZoom',
 'collectTextNodes','collectTextNodesIgnoreClass','childrenWithClassName'].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();