var AutoComplete=Class.create({selector:null,input:null,_timeout:null,visible:false,drawn:false,_hideTimeout:null,options:null,initialize:function(input,action,options) {this.action=action;this.input=$(input);this.input.autocomplete="off";this.options=new AutoComplete.Options(options||{});if(!this.input) alert('No input field/binding field given or found') if(!this.action) alert('No action url specified');this.selector=document.createElement('select');Event.observe(this.input,'focus',this._onInputFocus.bindAsEventListener(this));Event.observe(this.input,'keydown',this._onInputKeyDown.bindAsEventListener(this));Event.observe(this.input,'blur',this._onInputBlur.bindAsEventListener(this));Event.observe(this.selector,'blur',this._onSelectorBlur.bindAsEventListener(this));Event.observe(this.selector,'focus',this._onSelectorFocus.bindAsEventListener(this));Event.observe(this.selector,'change',this._onSelectorChange.bindAsEventListener(this));Event.observe(window,'resize',this._reposition.bind(this));Event.observe(window,'scroll',this._reposition.bind(this));},_onInputFocus:function(event) {this._onSelectorFocus(event);},_onSelectorBlur:function(event) {this._onInputBlur(event);},_onInputBlur:function(event) {this._hideTimeout=setTimeout(this._checkOnBlur.bind(this),100);},_checkOnBlur:function() {this._hideTimeout=null this.hide();},_onInputKeyUp:function(event) {this._suggest(event)&&Event.stop(event);},_onInputKeyDown:function(event) {this._suggest(event)&&Event.stop(event);},_onSelectorFocus:function(event) {if(this._hideTimeout) {clearTimeout(this._hideTimeout);this._hideTimeout=null;}},_onSelectorChange:function(event) {this.select();},draw:function() {if(this.drawn)return;if(this.options.cssClass) this.selector.className=this.options.cssClass;Element.setStyle(this.selector,{display:'none',position:'absolute',width:this.input.offsetWidth+'px'});this.selector.size=this.options.size;document.body.appendChild(this.selector);this.input.autocomplete='off';this.drawn=true;},hide:function() {if(!this.drawn||!this.visible)return;this.visible=false;if(window.Scriptaculous) {new Effect.BlindUp(this.selector,{duration:this.options.delay,queue:'end',afterFinish:function(event){Element.setStyle(this.selector,{display:'none'});this.selector.options.length=0;setTimeout(this._restoreFocus.bind(this),50);}.bind(this)});} else {Element.setStyle(this.selector,{display:'none'});this.selector.options.length=0;setTimeout(this._restoreFocus.bind(this),50);}},_restoreFocus:function(){this.input.focus();},show:function() {if(!this.drawn)this.draw();var trigger=null;if(this.selector.options.length) {if(window.Scriptaculous) {new Effect.BlindDown(this.selector,{duration:this.options.delay,queue:'end'});} else {Element.setStyle(this.selector,{display:'inline'});} this._reposition();this.visible=true;}},_cancelTimeout:function() {if(this._timeout) {clearTimeout(this._timeout);this._timeout=null;}},_suggest:function(event) {this._cancelTimeout();var key=Event.keyPressed(event);var ignoreKeys=[20,16,17,91,121,122,123,124,125,126,127,128,129,130,131,132,45,36,35,33,34,144,145,44,19,93,];if(ignoreKeys.indexOf(key)>-1) return false;switch(key) {case Event.KEY_LEFT:case Event.KEY_RIGHT:return false;break;case Event.KEY_TAB:case Event.KEY_BACKSPACE:case 46:this.cancel();return false;break;case Event.KEY_RETURN:if(this.visible) {this.select();return true;} return false;break;case Event.KEY_ESC:this.cancel();return true;break;case Event.KEY_UP:case Event.KEY_DOWN:this._interact(event);return true;break;default:break;} if(this.input.value.length>=this.options.threshold-1) {this._timeout=setTimeout(this._sendRequest.bind(this),1000*this.options.delay);} return false;},_sendRequest:function() {this._request=new Ajax.Request(this.action+this.input.value,{onComplete:this._process.bind(this),method:this.options.requestMethod});},_reposition:function() {if(!this.drawn)return;var pos=Position.cumulativeOffset(this.input);pos.push(pos[0]+this.input.offsetWidth);pos.push(pos[1]+this.input.offsetHeight);Element.setStyle(this.selector,{left:pos[0]+'px',top:pos[3]+'px'});},_process:function(objXML,jsonHeader) {this.selector.options.length=0;switch(this.options.resultFormat) {case AutoComplete.Options.RESULT_FORMAT_XML:this._parseXML(objXML.responseXML);break;case AutoComplete.Options.RESULT_FORMAT_JSON:if(!jsonHeader) {jsonHeader=objXML.responseText&&objXML.responseText.isJSON()?objXML.responseText.evalJSON():null;} this._parseJSON(jsonHeader);break;case AutoComplete.Options.RESULT_FORMAT_TEXT:this._parseText(objXML.responseText);break;default:alert("Unable to parse result type. Make sure you've set the resultFormat option correctly");break;} if(this.selector.options.length>(this.options.size)) this.selector.size=this.options.size;else this.selector.size=this.selector.options.length>1?this.selector.options.length:2;if(this.selector.options.length) {this.selector.selectedIndex=-1;this.show();} else this.cancel();},_parseXML:function(xml) {var suggestions=null;for(var i=0;i