var xmlHttp

	function showHint(str)
	{
		if (str.length==0)
		{ 
			document.getElementById("txtHint").innerHTML="";
			return;
		}
		xmlHttp=GetXmlHttpObject()
		if (xmlHttp==null)
		{
			alert ("Your browser does not support AJAX!");
			return;
		} 

		var url="gethint.php";
		url=url+"?q="+str;
		url=url+"&sid="+Math.random();
		xmlHttp.onreadystatechange=stateChanged;
		xmlHttp.open("GET",url,true);
		xmlHttp.send(null);
	} 

	function stateChanged() 
	{ 
		if (xmlHttp.readyState==4)
		{ 
		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;
	}