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(url)
{
    xmlHttpObject.open('get',url);
    xmlHttpObject.onreadystatechange = handleContent;
    xmlHttpObject.send(null);
    return false;
}

function handleContent()
{
    if (xmlHttpObject.readyState == 4)
            document.getElementById('content1-container').innerHTML = xmlHttpObject.responseText;    
}