var xmlHttp

function showHint(str)
{
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="+str
//alert(url);
url=url+"&sid="+Math.random()
//alert(url);
xmlHttp.onreadystatechange=stateChanged 
//alert(xmlHttp.onreadystatechange);
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
} 

function stateChanged() 
{ //alert(xmlHttp.readyState);
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
document.getElementById("txtHint").innerHTML=xmlHttp.responseText 
//alert(xmlHttp.responseText);
} 
} 



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