function lookup_email(str)
{
	//GetXmlHttpObject(); can be found in zip_hint.js
	//as can be var xmlHttp
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null)
	{
		alert ("Your browser does not support AJAX!");
		return;
	} 
	var url="js/email_lookup.php";
	url=url+"?q="+str;
	url=url+"&sid="+Math.random();
	xmlHttp.onreadystatechange=email_stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
} 

function email_stateChanged() 
{ 
	if (xmlHttp.readyState==4)
	{ 
		document.getElementById("valid_email").innerHTML=xmlHttp.responseText;
		validate_email();
	}
}