XHR Monitor

xhr-monitor.js

/* XHR Monitor
 *
 * @author Livingston Samuel
 * @copyright (c) 2010
 *
 * @browsers FF 3.6.3
 */

;(function (win, doc, XHR) {
  var currentEvent = '',
      beacon = (function () {
        var img = doc.createElement('img');

        return function (data) {
          img.src = 'http://DOMAIN/PATH/beacon.php?' + data;
        };
      }());
  
  XHR.prototype._send = XHR.prototype.send; //Reference to actual send method
  
  XHR.prototype.send = function () {
    beacon('element='+ encodeURIComponent(currentEvent) +'&data='+ encodeURIComponent(Array.prototype.join.call(arguments, ',')));
    
    XHR.prototype._send.apply(this, arguments);
  };
  
  doc.addEventListener("DOMContentLoaded", function () {
    doc.getElementsByTagName('body')[0].addEventListener('click', function (e) {
      currentEvent = e.originalTarget.nodeName + '#' + e.originalTarget.id +'.'+ e.originalTarget.className;
    }, true);
  }, false);
}(window, document, XMLHttpRequest));