var xmlhttp;
var emailval;
var email = /^[^@]+@[^@.]+\.[^@]*\w\w$/;
function chemail(emailval)
{
	//alert(emailval)
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
 alert ("Your browser does not support XMLHTTP!");
  return;
  }
  if(emailval==""){
	  alert("Please enter emailid")
    return false;
  } else{
if (!email.test(emailval)) {
		alert("Please Enter A Valid Email Address ")
		document.forms[0].email.value="";
		//document.forms[0].email.focus();
      	//email.style.backgroundColor = '#f1bcc9';	
        return false;
    } else {
		
     //email.style.backgroundColor = '#DCC5A9';	

var url="email_validation.php?emval="+emailval+"";
xmlhttp.onreadystatechange=stateChanged;

xmlhttp.open("GET",url,true);
xmlhttp.send(null);
  }
  }
}
function stateChanged()
{
	
if (xmlhttp.readyState==4)
  {
	 
  ////document.getElementById('left_msg').innerHTML=xmlhttp.responseText;
  if(xmlhttp.responseText=="user"){
	  
	 // alert("You are not a registered user");
	  //document.forms[0].email.value="";
	 return true;
	
  }

  }

 }

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;
}