var XMLHttpRequestObject = false;

if (window.XMLHttpRequest) {
    XMLHttpRequestObject = new XMLHttpRequest();
}
else if (window.ActiveXObject){
    XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
}

function getContactPage()
{
    var url = "ajax/contact-us.php?page=";

    //alert(url+dataSource);
    //alert("A"+url);
    if(XMLHttpRequestObject) {
        var obj = document.getElementById('contactus');
        XMLHttpRequestObject.open("GET", url);

        XMLHttpRequestObject.onreadystatechange = function()
        {
            if (XMLHttpRequestObject.readyState == 4 && XMLHttpRequestObject.status == 200) {
                obj.innerHTML = XMLHttpRequestObject.responseText;
            }
        }
        XMLHttpRequestObject.send(null);
    }
}