var Observer=new Class({Implements:[Options,Events],options:{periodical:false,delay:1000},initialize:function(C,A,B){this.setOptions(B);this.addEvent("onFired",A);this.element=$(C)||$$(C);this.value=this.element.get("value");if(this.options.periodical){this.timer=this.changed.periodical(this.options.periodical,this)}else{this.element.addEvent("keyup",this.changed.bind(this))}},changed:function(){var A=this.element.get("value");if($equals(this.value,A)){return }this.clear();this.value=A;this.timeout=this.onFired.delay(this.options.delay,this)},setValue:function(A){this.value=A;this.element.set("value",A);return this.clear()},onFired:function(){this.fireEvent("onFired",[this.value,this.element])},clear:function(){$clear(this.timeout||null);return this}});var $equals=function(B,A){return(B==A||JSON.encode(B)==JSON.encode(A))};