var uxmlHttp

function username(user)
{

uxmlHttp=GetXmlHttpObject()

if (uxmlHttp==null)
  {
  alert ("Browser does not support AJAX.  You need an AJAX capable browser to contribute.  Try downloading Mozilla Firefox.")
  return
  } 
var url="username.php"
url=url+"?user="+ user
uxmlHttp.onreadystatechange=uStateChanged
uxmlHttp.open("GET",url,true)
uxmlHttp.send(null)
} 

function uStateChanged() 
{ 
if (uxmlHttp.readyState==4 || uxmlHttp.readyState=="complete")
 { 

	document.getElementById("u").innerHTML = uxmlHttp.responseText
 } 
}


function GetXmlHttpObject()
{
var uxmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 uxmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 // Internet Explorer
 try
  {
  uxmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  uxmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return uxmlHttp;
}