var fx=new Object();fx.Base=function(){};fx.Base.prototype={setOptions:function(options){this.options={duration:500,onComplete:'',transition:fx.sinoidal}
Object.extend(this.options,options||{});},step:function(){var time=(new Date).getTime();if(time>=this.options.duration+this.startTime){this.now=this.to;clearInterval(this.timer);this.timer=null;if(this.options.onComplete)setTimeout(this.options.onComplete.bind(this),10);}
else{var Tpos=(time-this.startTime)/(this.options.duration);this.now=this.options.transition(Tpos)*(this.to-this.from)+this.from;}
this.increase();},custom:function(from,to){if(this.timer!=null)return;this.from=from;this.to=to;this.startTime=(new Date).getTime();this.timer=setInterval(this.step.bind(this),13);},hide:function(){this.now=0;this.increase();},clearTimer:function(){clearInterval(this.timer);this.timer=null;}}
fx.Layout=Class.create();fx.Layout.prototype=Object.extend(new fx.Base(),{initialize:function(el,options){this.el=$(el);this.el.style.overflow="hidden";this.iniWidth=this.el.offsetWidth;this.iniHeight=this.el.offsetHeight;this.setOptions(options);}});fx.Height=Class.create();Object.extend(Object.extend(fx.Height.prototype,fx.Layout.prototype),{increase:function(){this.el.style.height=this.now+"px";},toggle:function(){if(this.el.offsetHeight>0)this.custom(this.el.offsetHeight,0);else this.custom(0,this.el.scrollHeight);}});fx.Width=Class.create();Object.extend(Object.extend(fx.Width.prototype,fx.Layout.prototype),{increase:function(){this.el.style.width=this.now+"px";},toggle:function(){if(this.el.offsetWidth>0)this.custom(this.el.offsetWidth,0);else this.custom(0,this.iniWidth);}});fx.Opacity=Class.create();fx.Opacity.prototype=Object.extend(new fx.Base(),{initialize:function(el,options){this.el=$(el);this.now=1;this.increase();this.setOptions(options);},increase:function(){if(this.now==1&&(/Firefox/.test(navigator.userAgent)))this.now=0.9999;this.setOpacity(this.now);},setOpacity:function(opacity){if(opacity==0&&this.el.style.visibility!="hidden")this.el.style.visibility="hidden";else if(this.el.style.visibility!="visible")this.el.style.visibility="visible";if(window.ActiveXObject)this.el.style.filter="alpha(opacity="+opacity*100+")";this.el.style.opacity=opacity;},toggle:function(){if(this.now>0)this.custom(1,0);else this.custom(0,1);}});fx.sinoidal=function(pos){return((-Math.cos(pos*Math.PI)/2)+0.5);}
fx.linear=function(pos){return pos;}
fx.cubic=function(pos){return Math.pow(pos,3);}
fx.circ=function(pos){return Math.sqrt(pos);}