var xmlHttp

function SubscribeUser()	{
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null)	{
		alert ("Browser does not support HTTP Request")
		return
	}
	var url="php/add.php"
	url=url+"?email=" + document.getElementById("SubscribeEmailAddress").value
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=StateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

function StateChanged() { 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
		{
			document.getElementById("SubscribeUserResponse").innerHTML = xmlHttp.responseText
		} 
}

function GetXmlHttpObject()	{
	var xmlHttp=null;
	try	{
			// Firefox, Opera 8.0+, Safari
			xmlHttp=new XMLHttpRequest();
			}
	catch (e)	{
			//Internet Explorer
			try				{	xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");	}
			catch (e)	{	xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");	}
	}
	return xmlHttp;
}