var xmlHttp1
var name 
function usernamecheck(ctstr)
{
//alert("hai"+ctstr);
name = ctstr
if (ctstr.length==0)
{ 
document.getElementById("user").innerHTML=""
return
}
xmlHttp1=GetXmlHttpObject1()
if (xmlHttp1==null)
{
alert ("Browser does not support HTTP Request")
return
} 
var url="checkuser.php"
url=url+"?cat_id="+ctstr
url=url+"&sid="+Math.random()
xmlHttp1.onreadystatechange=stateChanged11
//alert (url);
xmlHttp1.open("GET",url,true)
//window.open(url)
xmlHttp1.send(null)
} 

function stateChanged11() 
{ 
	if (xmlHttp1.readyState==4 || xmlHttp1.readyState=="complete")
	{ 
	//document.getElementById("user").innerHTML=xmlHttp1.responseText 	
	alert(trim(xmlHttp1.responseText));
		if(trim(xmlHttp1.responseText) == "Username is unavailable.")
		{ 
            showuserid(name,name);
		}
	} 
} 

function GetXmlHttpObject1()
{ 
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}