function getResponse(url, query, responseElement){
    var xmlHttp = null;
	
	document.getElementById(responseElement).innerHTML="<img src='img/loading.gif'>";
	
	//if (str.length==0){ 		
	//	document.getElementById(repsonseElement).innerHTML="";
	//	return null;
	//}	
	
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null){
		alert ("Browser does not support HTTP Request");
		return null;
	} 		
		
	url=url+"?"+query;
	url=url+"&sid="+Math.random();	
			
	xmlHttp.onreadystatechange=function(){
		if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
			document.getElementById(responseElement).innerHTML=xmlHttp.responseText;
		}	
	}
	
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 

function GetXmlHttpObject(){ 
	var objXMLHttp=null;
	if (window.XMLHttpRequest){
		objXMLHttp=new XMLHttpRequest();
	}else if (window.ActiveXObject){
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	
	return objXMLHttp;
}