var xmlHttp

function chkuser(str)
{ 
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)
 	{
 		alert ("Browser does not support HTTP Request")
 		return
 	}
var url="chkuser.php"
url=url+"?username="+str
//alert(url);
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("chkemailid").innerHTML=xmlHttp.responseText 
	var response = xmlHttp.responseText;	
	//alert(response);
	if(response == "True")
	{
		document.getElementById("chkuserid").innerHTML="<small><font color=#FF0000> Username already exists, choose another</font></small>" 
		document.frmSignup.flg.value = "False";		
		
	}
	else
	{
		//document.getElementById("chkemailid").innerHTML="<small><font color=#006600>Email is available!</font></small>"; 
		document.getElementById("chkuserid").innerHTML="";
		document.frmSignup.flg.value = "True"	;	
	}	
 } 
}

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;
}