From COKS - Open Source Center - Slovenia

Note: After saving, you may have to bypass your browser's cache to see the changes. Mozilla / Firefox / Safari: hold down Shift while clicking Reload, or press Ctrl-Shift-R (Cmd-Shift-R on Apple Mac); IE: hold Ctrl while clicking Refresh, or press Ctrl-F5; Konqueror:: simply click the Reload button, or press F5; Opera users may need to completely clear their cache in Tools→Preferences.

/* Any JavaScript here will be loaded for all users on every page load. */
/*** Place in MediaWiki:Common.js ****/
function makeRequest(url) {
  var httpRequest;                             
 
  if (window.XMLHttpRequest) { // Mozilla, Safari, ...
      httpRequest = new XMLHttpRequest();
  } else if (window.ActiveXObject) { // IE
    try {
      httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
      try {
        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
      } catch (e) {}
    }
  }
 
  if (!httpRequest) {
    alert("Giving up :( Cannot create an XMLHTTP instance");
    return false;
  }
  httpRequest.onreadystatechange = function() { alertContents(httpRequest); };
  httpRequest.open("GET", url, true);
  httpRequest.send(null);
}
 
function alertContents(httpRequest) {
 
  if (httpRequest.readyState == 4) {
    if (httpRequest.status == 200) {
        document.getElementById("p-calendar").innerHTML = httpRequest.responseText;
    } else {
        document.getElementById("p-calendar").innerHTML = "<p>There was a problem with the request.</p>";
    }
  }
}