//addLoadEvent(function() { do stuff here; });

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}
//
// if you want to see the data, "makeHttpRequest(url, alert)"
//
function makeHttpRequest(url, callback_function, return_xml) {
 var http_request, response, i;

 var activex_ids = [
   'MSXML2.XMLHTTP.3.0',
   'MSXML2.XMLHTTP',
   'Microsoft.XMLHTTP'
 ];

 if (window.XMLHttpRequest) { // Mozilla, Safari, IE7+...
   http_request = new XMLHttpRequest();
   if (http_request.overrideMimeType) {
     http_request.overrideMimeType('text/xml');
   }
 } else if (window.ActiveXObject) { // IE6 and older
   for (i = 0; i < activex_ids.length; i++) {
     try {
       http_request = new ActiveXObject(activex_ids[i]);
     } catch (e) {}
   }
 }

 if (!http_request) {
   //alert("Unfortunately your browser doesn't support this feature.");
   return false;
 }

 http_request.onreadystatechange = function() {
   if (http_request.readyState !== 4) {
       // not ready yet
       return;
   }
   if (http_request.status !== 200) {
     // ready, but not OK
     //alert('There was a problem with the request.(Code: ' + http_request.status + ')');
     return;
   }
   if (return_xml) {
     response = http_request.responseXML;
   } else {
     response = http_request.responseText;
   }
   // invoke the callback
   callback_function(response);
 };

 http_request.open('GET', url, true);
 http_request.send(null);
}