var AutoAssist=Class.create();AutoAssist.prototype={version:"0.6",status:"none",cssSelector:{main:"aa",highlight:"aa_highlight",wait:"aa_wait"},defaultOptions:{eventName:"onSelect"},initialize:function(txtBox,getURL,options){this.txtBox=$(txtBox);this.txtBox.onkeydown=this.onkeydown.bindAsEventListener(this);this.txtBox.autoassist=this;this.timeoutId=0;this.getURL=getURL;this.floatDiv=document.getElementById("aa_autoassist");this.floatDiv.style.position="absolute";Element.addClassName(this.floatDiv,this.cssSelector.main);Element.hide(this.floatDiv);this.currentNodeIndex=-1;this.size=-1;this.setOptions(options);this.lastvalue='';Event.observe(window,"click",this.hide.bindAsEventListener(this));},setOptions:function(options){this.options=this.defaultOptions;Object.extend(this.options,options||{});},onkeydown:function(evt){switch(evt.keyCode){case Event.KEY_ESC:this.hide();return;case Event.KEY_UP:this.up();this.show();this.select();return;case Event.KEY_DOWN:this.down();this.show();this.select();return;case Event.KEY_RETURN:this.hide();default:if(this.timeoutId!=0){clearTimeout(this.timeoutId);}
var stat="$('"+this.txtBox.id+"').autoassist.doRequest();";this.timeoutId=setTimeout(stat,500);this.hide();}},select:function(){if(this.currentNode()){var stat=this.currentNode().getAttribute(this.options.eventName);try{eval(stat);}catch(e){};}},currentNode:function(){if(this.children){return this.children[this.currentNodeIndex];}else{return undefined;}},highlight:function(h){if(this.currentNode()){Element.removeClassName(this.currentNode(),this.cssSelector.highlight);}
this.currentNodeIndex=h;if(this.currentNode()){Element.addClassName(this.currentNode(),this.cssSelector.highlight);}},up:function(){if(this.currentNodeIndex>-1)this.highlight(this.currentNodeIndex-1);},down:function(){if(this.currentNodeIndex<this.size-1)this.highlight(this.currentNodeIndex+1);},cleanup:function(){this.size=0;this.currentNodeIndex=-1;this.floatDiv.innerHTML="";},isValidNode:function(n){return(n.nodeType==1)&&(n.getAttribute(this.options.eventName)!=undefined);},preRequest:function(){if(this.txtBox.value.length<3)return false;if(this.lastvalue==this.txtBox.value)return false;this.lastvalue=this.txtBox.value;return true;},getURL:function(){},doRequest:function(){if(this.preRequest()){this.onLoading();var defaultOptions={method:"get",onComplete:this.onComplete.bindAsEventListener(this),onFailure:this.onFailure.bindAsEventListener(this)}
this.currentRequest=new Ajax.Updater(this.floatDiv,this.getURL(),defaultOptions);}},onFailure:function(){},onLoading:function(){this.cleanup();this.hide();Element.addClassName(this.txtBox,this.cssSelector.wait);},onComplete:function(){if(this.currentRequest.transport==arguments[0]){this.size=0;this.currentNodeIndex=-1;var children=this.floatDiv.childNodes;this.children=new Array();for(var i=0;i<children.length;i++){var item=children[i];if(this.isValidNode(item)){var f=new Function("this.highlight("+this.size+"); ");Event.observe(item,"mouseover",f.bindAsEventListener(this));Event.observe(item,"click",this.select.bindAsEventListener(this));Event.observe(item,"click",this.hide.bindAsEventListener(this));this.children.push(item);this.size++;}}
this.down();this.show();Element.removeClassName(this.txtBox,this.cssSelector.wait);}},show:function(){this.floatDiv.style.width=this.txtBox.offsetWidth-8+"px";var p=Position.cumulativeOffset(this.txtBox);this.floatDiv.style.top=p[1]+this.txtBox.offsetHeight+"px";this.floatDiv.style.left=p[0]+"px";this.status="show";Element.show(this.floatDiv);},hide:function(){this.status="none";Element.hide(this.floatDiv);this.lastvalue=this.txtBox.value;}}