// JavaScript Document

function makeHttpRequest(url, callback_function, return_xml, img_type, img_num)
{
   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) {
       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, ' + img_type + ', ' + img_num + ')');
               } else {
                   eval(callback_function + '(http_request.responseText, ' + img_type + ', ' + img_num + ')');
               }
           } 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, img_type, img_num)
{
    var html_content = xml.getElementsByTagName('content').item(0).firstChild.nodeValue;
    var reload_after = xml.getElementsByTagName('reload').item(0).firstChild.nodeValue;
    document.getElementById('banner' + img_type + '_' + img_num).innerHTML = html_content;

    try {
        clearTimeout(to);
    } catch (e) {}

    to = setTimeout("triggerBanner(" + img_type + ", " + img_num + ")", parseInt(reload_after));


}

function nextAd(img_type, img_num)
{
    var now = new Date();
    var root = "http://www.nurse-recruiter.com/";
	var url = root + 'banner_pt.php?ts=' + now.getTime() + '&bantype=' + img_type;
    makeHttpRequest(url, 'loadBanner', true, img_type, img_num);
}

function triggerBanner() {
	for (i=1;i<5;i++) {
		for (z=1;z<5;z++) {
			if (document.getElementById('banner' + i + '_' + z)) {
				nextAd(i,z);
				}
			}
		}
	}