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

function showHint(str)
{
if (str.length==0)
{ 
document.getElementById("txtHint").innerHTML=""
return
}
xmlHttp=getHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
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 getHttpObject() {
        if (window.ActiveXObject) {
                return new ActiveXObject("Microsoft.XMLHTTP")
        }
        if (window.XMLHttpRequest) {
                return new XMLHttpRequest();
        }
        return false;
}