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