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="registration/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;
		showSuggestion();
	} 
}