var xmlHttp
function GetXmlHttpObject()
{ 
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}
function getemail(id)
{
	//alert("here in email");
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request");
return
} 

var url="getemail.php";
url=url+"?id="+id;
xmlHttp.onreadystatechange=sebest1
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
	
}
function sebest1() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{ 
	//alert(xmlHttp.responseText);
	
	if(document.getElementById("email").value!="")
	{
	if(xmlHttp.responseText!=0)
		{
		alert("This e-mail address is already exist");
		document.getElementById("email").value="";
		document.getElementById("email").focus();
		return false;
		}
	}

} 
}