var xmlHttpValidateUsername
var uname
function validateUsername(username)
{
	if (username.length==0)
	{ 
		return
	}
	uname = username
	xmlHttpValidateUsername=getHTTPObject()
	if (xmlHttpValidateUsername==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	} 
	var url="php/validateUsername.php"
	
	url=url+"?username="+username
	//alert(url);
	url=url+"&stid="+Math.random()
	xmlHttpValidateUsername.onreadystatechange=stateChangedValidateUsername
	xmlHttpValidateUsername.open("GET",url,true)
	xmlHttpValidateUsername.send(null)
} 

function stateChangedValidateUsername() 
{ 
	if (xmlHttpValidateUsername.readyState==4 || xmlHttpValidateUsername.readyState=="complete")
	{
		document.getElementById("txtValidUsername").innerHTML=xmlHttpValidateUsername.responseText 
		
		/*if(document.getElementById('validUsername').value=="1") {
			hideSuggestion();
		}
		else {
			showSuggestion();
		}*/
		showSuggestion();
	} 
} 

//The function used to create a XMLHttpRequest object
function getHTTPObject()	{
	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;
}