Fx.Height=Class.create();Fx.Height.prototype=Object.extend(new Fx.Base(),{initialize:function(el,options){this.element=$(el);this.setOptions(options);this.element.style.overflow='hidden';},toggle:function(){if(this.element.offsetHeight>0)return this.custom(this.element.offsetHeight,0);else return this.custom(0,this.element.scrollHeight);},show:function(){return this.set(this.element.scrollHeight);},increase:function(){this.setStyle(this.element,'height',this.now);}});Fx.Width=Class.create();Fx.Width.prototype=Object.extend(new Fx.Base(),{initialize:function(el,options){this.element=$(el);this.setOptions(options);this.element.style.overflow='hidden';this.iniWidth=this.element.offsetWidth;},toggle:function(){if(this.element.offsetWidth>0)return this.custom(this.element.offsetWidth,0);else return this.custom(0,this.iniWidth);},show:function(){return this.set(this.iniWidth);},increase:function(){this.setStyle(this.element,'width',this.now);}});Fx.Opacity=Class.create();Fx.Opacity.prototype=Object.extend(new Fx.Base(),{initialize:function(el,options){this.element=$(el);this.setOptions(options);this.now=1;},toggle:function(){if(this.now>0)return this.custom(1,0);else return this.custom(0,1);},show:function(){return this.set(1);},increase:function(){this.setStyle(this.element,'opacity',this.now);}});