function duoAutoComplete(elem,controller,dropdownId,idField){
	//should eventually include, elemId,query,fields etc..
	//varis below global to this object
	//params
	var suggestElem=elem;
	this.suggestValue='';
	var suggestBoxId=dropdownId;
	var storageId=idField;
	var suggestController=controller;
	var object=this;
	//methods
	this.autoComplete=ac_autoComplete;
	this.autoComplete_res=ac_autoComplete_res;
	this.autoCompleteSetChosen=ac_autoCompleteSetChosen;
	this.autoCompleteSelect=ac_autoCompleteSelect;
	this.autoCompleteSetChosen=ac_autoCompleteSetChosen;
	this.setStorageId=ac_setStorageId;
	this.removeSuggest=ac_removeSuggest;
	this.removeSuggestBlur=ac_removeSuggestBlur;
	this.mouseOver=ac_mouseOver;
	this.mouseClick=ac_mouseClick;

	//setup input listener
	objectListen(suggestElem,'keyup', this.autoComplete); 
	objectListen(suggestElem,'blur', this.removeSuggestBlur);
	
	function ac_autoComplete(){
		if(suggestElem && suggestElem.value && this.suggestValue!=suggestElem.value){
			var myConn = new XHConn();
			if (myConn && elem.value!=suggestElem){
				myConn.connect(suggestController+escape(suggestElem.value)+"/", "POST", "", object.autoComplete_res);
			}
			this.suggestValue=suggestElem.value;
		}	
	}
	
	function ac_autoComplete_res(data){
		var data=eval('('+data.responseText+')');
		if(data && data.error){	
			alert(data.error);
			return;
		}
		if(data){
			var Data=data.info;	
			if (Data.length>0){
				if(document.getElementById(suggestBoxId)){
					var compSuggest=document.getElementById(suggestBoxId);			
				}else{
					var compSuggest=document.createElement('DIV');
					compSuggest.id=suggestBoxId;
					var bods=document.getElementsByTagName('body');
					bods[0].appendChild(compSuggest);
				}
				//setup element in the same place
				var xpos=getAbsX(suggestElem);
				var ypos=getAbsY(suggestElem)+23;
				compSuggest.style.left=xpos+"px";
				compSuggest.style.top=ypos+"px";
				compSuggest.style.display="block";	
				compSuggest.style.width=suggestElem.offsetWidth+"px";
			
				var list=document.getElementById(suggestBoxId);
				var html='';
				var Data=data.info;	
				for (var Row in Data){
					if(Data[Row].value){
						html+="<a href='javascript:void();' class='"+Data[Row].id+"'>"+Data[Row].value+"</a>";		
					}
				}
				list.innerHTML=html;
				var listItems=document.getElementById(dropdownId).getElementsByTagName('A');
				for(i=0;i<listItems.length;i++){
					objectListen(listItems[i],'mouseover', object.mouseOver);
					objectListen(listItems[i],'mousedown', object.mouseClick);
				}
				
				//onmouseover='"+insName+".autoCompleteSetChosen(this);'
				objectListen(document,'keyup',object.autoCompleteSelect);
			}
		}else{
			object.removeSuggest();
		}
	}
	
	function ac_mouseOver(e){
		if(browser=="ie"){var e=window.event;var item=window.event.srcElement;}else{var item=e.target;}	
		ac_autoCompleteSetChosen(item);		
	}
	
	function ac_mouseClick(e){
		suggestElem.value=html_unescape(document.getElementById(dropdownId+'Active').innerHTML);
		object.setStorageId(document.getElementById(dropdownId+'Active').className);		
		object.removeSuggest();
	}
	
	function ac_autoCompleteSelect(e){	
		if(document.getElementById(suggestBoxId)){
			if(browser=="ie"){var e=window.event;var item=window.event.srcElement;}else{var item=e.target;}
			if(e.keyCode==40){//if down cursor is selected
				var list=document.getElementById('compSuggest');
				var listItems=document.getElementById('compSuggest').getElementsByTagName('A');
				if(document.getElementById('compSuggestActive')){
					var chosen=document.getElementById('compSuggestActive');
					if(chosen.nextSibling){				
						object.autoCompleteSetChosen(chosen.nextSibling)
					}else{
						object.autoCompleteSetChosen(listItems[0]);	
					}
					//objDiv.scrollTop = objDiv.scrollHeight;
					
					//scroll down when selected beyond bottom of scroller
					if(list.scrollHeight>list.offsetHeight){
						var selecY=getAbsY(document.getElementById(dropdownId+'Active'));
						var listBottom=getAbsY(list)+list.offsetHeight;
						list.scrollTop=selecY-getAbsY(list)-(list.offsetHeight/2)+10;					
					}
					
				}else{
					object.autoCompleteSetChosen(listItems[0]);
				}
				stopEvent(e);
			}
			if(e.keyCode==38){//if up cursor is selected
				var list=document.getElementById('compSuggest');
				var listItems=document.getElementById(dropdownId).getElementsByTagName('A');
				if(document.getElementById(dropdownId+'Active')){
					var chosen=document.getElementById(dropdownId+'Active');
					if(chosen.previousSibling){				
						object.autoCompleteSetChosen(chosen.previousSibling)
					}else{
						object.autoCompleteSetChosen(listItems[(listItems.length-1)]);
					}
				}else{
					object.autoCompleteSetChosen(listItems[0]);
				}
				//scroll up when selected above bottom of scroller
				var selecY=getAbsY(document.getElementById(dropdownId+'Active'));
				var pos1=selecY-getAbsY(list);
				var pos2=selecY-getAbsY(list)-(list.offsetHeight/2);
				
				document.getElementById('statusbar').innerHTML=pos1+" "+pos2;
				if(list.scrollTop!=(selecY-getAbsY(list))){
					list.scrollTop=selecY-getAbsY(list)-(list.offsetHeight/2)+10;
				}
				stopEvent(e);				
			}
			if(e.keyCode==13){
				if(document.getElementById(dropdownId+'Active')){
					suggestElem.value=html_unescape(document.getElementById(dropdownId+'Active').innerHTML);
					object.setStorageId(document.getElementById(dropdownId+'Active').className);
					object.removeSuggest();
				}
				stopEvent(e);
			}
		}else{
			if(e.keyCode==40){
				object.autoComplete();
			}
		}
		
	}
	
	function ac_removeSuggestBlur(){
		try{
			if(document.activeElement){
				var elem=document.activeElement;
				if(elem.getAttribute('id')==suggestBoxId){
					return;
				}
			}
			object.removeSuggest();
		}catch(e){}
	}	
	function ac_removeSuggest(){
		//close element
		if(document.getElementById(suggestBoxId)){
			//objectStopListen(suggestElem,'keyup', this.autoComplete);
			document.getElementById(suggestBoxId).parentNode.removeChild(document.getElementById(suggestBoxId));
		}
	}	
	function ac_autoCompleteSetChosen(elem){
		if(document.getElementById(dropdownId+'Active')){
			var chosen=document.getElementById(dropdownId+'Active');
			chosen.removeAttribute('id');
		}
		elem.id=dropdownId+'Active';
	}
	
	function html_unescape(html){
		html=html.replace(/&amp;/i,"&");
		//add more as required
		return html;
	}
	
	function ac_setStorageId(val){
		if(document.getElementById(storageId)){document.getElementById(storageId).value=val;}		
	}
	
}//close of autocomplete object