function SendAjax(url, callbackFunction) {
   if (window.XMLHttpRequest) {
      var request = new XMLHttpRequest();
   } else {
      var request = new ActiveXObject("Microsoft.XMLHTTP");
   }
 
   request.open("GET", url, true);
   request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
 
   request.onreadystatechange = function() {
      if (request.readyState == 4 && request.status == 200) {
         if (request.responseText) {
            ReceiveAjax(request.responseText, callbackFunction);
         }
      }
   }

   request.send(null);
}

function ReceiveAjax(response, callbackFunction) {
   callbackFunction(response);
}