/*  Prototype: an object-oriented Javascript library, version 1.2.0
 *  (c) 2005 Sam Stephenson <sam@conio.net>
 *
 *  THIS FILE IS AUTOMATICALLY GENERATED. When sending patches, please diff
 *  against the source tree, available from the Prototype darcs repository. 
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *
 *  For details, see the Prototype web site: http://prototype.conio.net/
 *
/*--------------------------------------------------------------------------*/

var Prototype = {
  Version: '1.2.0'
}

var Class = {
  create: function() {
    return function() { 
      this.initialize.apply(this, arguments);
    }
  }
}

var Abstract = new Object();

Object.prototype.extend = function(object) {
  for (property in object) {
    this[property] = object[property];
  }
  return this;
}

Function.prototype.bind = function(object) {
  var method = this;
  return function() {
    method.apply(object, arguments);
  }
}

Function.prototype.bindAsEventListener = function(object) {
  var method = this;
  return function(event) {
    method.call(object, event || window.event);
  }
}

Number.prototype.toColorPart = function() {
  var digits = this.toString(16);
  if (this < 16) return '0' + digits;
  return digits;
}

var Try = {
  these: function() {
    var returnValue;
    
    for (var i = 0; i < arguments.length; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) {}
    }
    
    return returnValue;
  }
}

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

var PeriodicalExecuter = Class.create();
PeriodicalExecuter.prototype = {
  initialize: function(callback, frequency) {
    this.callback = callback;
    this.frequency = frequency;
    this.currentlyExecuting = false;
    
    this.registerCallback();
  },
  
  registerCallback: function() {
    setTimeout(this.onTimerEvent.bind(this), this.frequency * 1000);
  },
  
  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try { 
        this.currentlyExecuting = true;
        this.callback(); 
      } finally { 
        this.currentlyExecuting = false;
      }
    }
    
    this.registerCallback();
  }
}

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

function $() {
  var elements = new Array();
  
  for (var i = 0; i < arguments.length; i++) {
    var element = arguments[i];
    if (typeof element == 'string')
      element = document.getElementById(element);

    if (arguments.length == 1) 
      return element;
      
    elements.push(element);
  }
  
  return elements;
}

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

if (!Array.prototype.push) {
  Array.prototype.push = function() {
		var startLength = this.length;
		for (var i = 0; i < arguments.length; i++)
      this[startLength + i] = arguments[i];
	  return this.length;
  }
}


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

var Effect = new Object();

Effect.Highlight = Class.create();
Effect.Highlight.prototype = {
  initialize: function(element) {
    this.element = $(element);
    this.start  = 153;
    this.finish = 255;
    this.current = this.start;
    this.fade();
  },
  
  fade: function() {
    if (this.isFinished()) return;
    if (this.timer) clearTimeout(this.timer);
    this.highlight(this.element, this.current);
    this.current += 17;
    this.timer = setTimeout(this.fade.bind(this), 250);
  },
  
  isFinished: function() {
    return this.current > this.finish;
  },
  
  highlight: function(element, current) {
    element.style.backgroundColor = "#ffff" + current.toColorPart();
  }
}


Effect.Fade = Class.create();
Effect.Fade.prototype = {
  initialize: function(element) {
    this.element = $(element);
    this.start  = 100;
    this.finish = 0;
    this.current = this.start;
    this.fade();
  },
  
  fade: function() {
    if (this.isFinished()) { this.element.style.display = 'none'; return; }
    if (this.timer) clearTimeout(this.timer);
    this.setOpacity(this.element, this.current);
    this.current -= 10;
    this.timer = setTimeout(this.fade.bind(this), 50);
  },
  
  isFinished: function() {
    return this.current <= this.finish;
  },
  
  setOpacity: function(element, opacity) {
    opacity = (opacity == 100) ? 99.999 : opacity;
    element.style.filter = "alpha(opacity:"+opacity+")";
    element.style.opacity = opacity/100 /*//*/;
  }
}

Effect.Scale = Class.create();
Effect.Scale.prototype = {
  initialize: function(element, percent) {
    this.element = $(element);
    this.startScale    = 1.0;
    this.startHeight   = this.element.offsetHeight;
    this.startWidth    = this.element.offsetWidth;
    this.currentHeight = this.startHeight;
    this.currentWidth  = this.startWidth;
    this.finishScale   = (percent/100) /*//*/;
    if (this.element.style.fontSize=="") this.sizeEm = 1.0;
    if (this.element.style.fontSize.indexOf("em")>0)
       this.sizeEm      = parseFloat(this.element.style.fontSize);
    if(this.element.effect_scale) {
      clearTimeout(this.element.effect_scale.timer);
      this.startScale  = this.element.effect_scale.currentScale;
      this.startHeight = this.element.effect_scale.startHeight;
      this.startWidth  = this.element.effect_scale.startWidth;
      if(this.element.effect_scale.sizeEm) 
        this.sizeEm    = this.element.effect_scale.sizeEm;      
    }
    this.element.effect_scale = this;
    this.currentScale  = this.startScale;
    this.factor        = this.finishScale - this.startScale;
    this.options       = arguments[2] || {}; 
    this.scale();
  },
  
  scale: function() {
    if (this.isFinished()) { 
      this.setDimensions(this.element, this.startWidth*this.finishScale, this.startHeight*this.finishScale);
      if(this.sizeEm) this.element.style.fontSize = this.sizeEm*this.finishScale + "em";
      if(this.options.complete) this.options.complete(this);
      return; 
    }
    if (this.timer) clearTimeout(this.timer);
    if (this.options.step) this.options.step(this);
    this.setDimensions(this.element, this.currentWidth, this.currentHeight);
    if(this.sizeEm) this.element.style.fontSize = this.sizeEm*this.currentScale + "em";
    this.currentScale += (this.factor/10) /*//*/;
    this.currentWidth = this.startWidth * this.currentScale;
    this.currentHeight = this.startHeight * this.currentScale;
    this.timer = setTimeout(this.scale.bind(this), 50);
  },
  
  isFinished: function() {
    return (this.factor < 0) ? 
      this.currentScale <= this.finishScale : this.currentScale >= this.finishScale;
  },
  
  setDimensions: function(element, width, height) {
    element.style.width = width + 'px';
    element.style.height = height + 'px';
  }
}

Effect.Squish = Class.create();
Effect.Squish.prototype = {
  initialize: function(element) {
    this.element = $(element);
    new Effect.Scale(this.element, 1, { complete: this.hide.bind(this) } );
  },
  hide: function() {
    this.element.style.display = 'none';
  } 
}

Effect.Puff = Class.create();
Effect.Puff.prototype = {
  initialize: function(element) {
    this.element = $(element);
    this.opacity = 100;
    this.startTop  = this.element.top || this.element.offsetTop;
    this.startLeft = this.element.left || this.element.offsetLeft;
    new Effect.Scale(this.element, 200, { step: this.fade.bind(this), complete: this.hide.bind(this) } );
  },
  fade: function(effect) {
    topd    = (((effect.currentScale)*effect.startHeight) - effect.startHeight)/2;
    leftd   = (((effect.currentScale)*effect.startWidth) - effect.startWidth)/2;
    this.element.style.position='absolute';
    this.element.style.top = this.startTop-topd + "px";
    this.element.style.left = this.startLeft-leftd + "px";
    this.opacity -= 10;
    this.setOpacity(this.element, this.opacity); 
    if(navigator.appVersion.indexOf('AppleWebKit')>0) this.element.innerHTML += ''; //force redraw on safari
  },
  hide: function() {
    this.element.style.display = 'none';
  },
  setOpacity: function(element, opacity) {
    opacity = (opacity == 100) ? 99.999 : opacity;
    element.style.filter = "alpha(opacity:"+opacity+")";
    element.style.opacity = opacity/100 /*//*/;
  }
}

Effect.Appear = Class.create();
Effect.Appear.prototype = {
  initialize: function(element) {
    this.element = $(element);
    this.start  = 0;
    this.finish = 100;
    this.current = this.start;
    this.fade();
  },
  
  fade: function() {
    if (this.isFinished()) return;
    if (this.timer) clearTimeout(this.timer);
    this.setOpacity(this.element, this.current);
    this.current += 10;
    this.timer = setTimeout(this.fade.bind(this), 50);
  },
  
  isFinished: function() {
    return this.current > this.finish;
  },
  
  setOpacity: function(element, opacity) {
    opacity = (opacity == 100) ? 99.999 : opacity;
    element.style.filter = "alpha(opacity:"+opacity+")";
    element.style.opacity = opacity/100 /*//*/;
    element.style.display = '';
  }
}

Effect.ContentZoom = Class.create();
Effect.ContentZoom.prototype = {
  initialize: function(element, percent) {
    this.element = $(element);
    if (this.element.style.fontSize=="") this.sizeEm = 1.0;
    if (this.element.style.fontSize.indexOf("em")>0)
       this.sizeEm = parseFloat(this.element.style.fontSize);
    if(this.element.effect_contentzoom) {
      this.sizeEm = this.element.effect_contentzoom.sizeEm;
    }
    this.element.effect_contentzoom = this;
    this.element.style.fontSize = this.sizeEm*(percent/100) + "em" /*//*/;
    if(navigator.appVersion.indexOf('AppleWebKit')>0) { this.element.scrollTop -= 1; };
  }
}