var xmlhttp;

function showUser(email)
{

xmlhttp=GetXmlHttpObject();

if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
var url= "checkemail.aspx";
url=url+"?email="+email;
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);

}

function stateChanged()
{
if (xmlhttp.readyState==4)

{

document.getElementById("txtHint").innerHTML=xmlhttp.responseText;


}
}

function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");

  }
return null;
}