// JavaScript Document
var xmlhttp;

function check_email(email)
{

	if (email.length<6|| !email.match(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/) )
		{
			return false;
		}
//alert(email);
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
  
var url="check_email_exist.php";
url=url+"?email="+email;

xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

	function stateChanged()
	{
		if (xmlhttp.readyState==4)
			{
				var response=xmlhttp.responseText;
				//alert(response);
				if(response!="")
				{
				document.getElementById("demail").innerHTML=response;
				}
				if(response=="")
				{
				document.getElementById("demail").innerHTML="";
				}
			}
	}
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;
}