//globale Instanz von XMLHttpRequest
var xmlHttp = false;

//XMLHttpRequest-Instanz erstellen
//... für Internet Explorer
try {
    xmlHttp  = new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
    try {
        xmlHttp  = new ActiveXObject("Microsoft.XMLHTTP");
    } catch(e) {
        xmlHttp  = false;
    }
}
//... für Mozilla, Opera, Safari usw.
if (!xmlHttp  && typeof XMLHttpRequest != 'undefined') {
    xmlHttp = new XMLHttpRequest();
}

function saveNewsletterData()
{
 if (xmlHttp) {
	 xmlHttp.open('GET', 'modules/newsletter/controller.php?savedata=true&nl_name='+document.frmnewsletter.nl_name.value+'&nl_email='+document.frmnewsletter.nl_email.value);
     xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
     xmlHttp.send('nl_name='+document.frmnewsletter.nl_name.value+'&nl_email='+document.frmnewsletter.nl_email.value);
 }
 
 document.frmnewsletter.nl_name.value = 'Name';
 document.frmnewsletter.nl_email.value = 'eMail';
}