var xmlHttpObject = false;

if (typeof XMLHttpRequest != 'undefined') 
{
    xmlHttpObject = new XMLHttpRequest();
}
if (!xmlHttpObject) 
{
    try 
    {
        xmlHttpObject = new ActiveXObject("Msxml2.XMLHTTP");
    }
    catch(e) 
    {
        try 
        {
            xmlHttpObject = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch(e) 
        {
            xmlHttpObject = null;
        }
    }
}

function loadContent()
{
    xmlHttpObject.open('get','/ajx/ajx_email.php'); // in der verlinkten datei sind die inhalte die nachgeladen werden!
    xmlHttpObject.onreadystatechange = handleContent;
    xmlHttpObject.send(null);
    return false;
}

function handleContent()
{
    if (xmlHttpObject.readyState == 4)
    {
        document.getElementById('myContent').innerHTML = xmlHttpObject.responseText;
    }
}