function makeHttpRequest(url, callback_function, return_xml)
 {
    var http_request = false;
  
    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml');
        }
  
    } else if (window.ActiveXObject) { // IE
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    }
  
    if (!http_request) {
        alert('Unfortunatelly you browser doesn\'t support this feature.');
        return false;
    }
    http_request.onreadystatechange = function() {
        if (http_request.readyState == 4) {
            if (http_request.status == 200) {
                if (return_xml) {
                    eval(callback_function + '(http_request.responseXML)');
                } else {
                    eval(callback_function + '(http_request.responseText)');
                }
            } else {
                alert('There was a problem with the request.(Code: ' + http_request.status + ')');
            }
        }
    }
    http_request.open('GET', url, true);
    http_request.send(null);
 }
  
 function loadBanner(xml)
 {
     var html_content = xml.getElementsByTagName('content').item(0).firstChild.nodeValue;
     var reload_after = xml.getElementsByTagName('reload').item(0).firstChild.nodeValue;
     document.getElementById('ajax-banner').innerHTML = html_content;
  
     try {
         clearTimeout(to);
     } catch (e) {}
  
     to = setTimeout("nextAd()", parseInt(reload_after));
  
  
 }
  
 function nextAd()
 {
     var now = new Date();
     var url = 'testimonials_home.php?ts=' + now.getTime();
     makeHttpRequest(url, 'loadBanner', true);
 }
  
 window.onload = nextAd;