var xmlHttp
	function showHint(uname)
	{
			//alert(uname);
		/*if (str.length==0)
		{ 
			document.getElementById("txtHint").innerHTML=""
			return
		}*/
		xmlHttp=GetXmlHttpObject()
		if (xmlHttp == null)
		{
			alert ("Browser does not support HTTP Request")
			return
		} 
		var url="gethint.php"
		url=url+"?q=" + uname
		//url=url+"&sid=" + Math.random()
		xmlHttp.onreadystatechange=stateChanged 
		xmlHttp.open("GET",url,true)
		xmlHttp.send(null)
	}

	function stateChanged()
	{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){ 
	 document.getElementById("txtHint").innerHTML=xmlHttp.responseText 
	 } 
	}
	function GetXmlHttpObject(){
		var xmlHttp=null;
	try{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}catch (e){
	 // Internet Explorer
	try{
	  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
	}catch (e){
	  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	}
	return xmlHttp;
	}