/**
 * Implementation of 
 * <a href="http://en.wikipedia.org/wiki/XMLHttpRequest" target="_blank">XMLHttpRequest</a>
 * for Internet Explorer. 
 * @class XMLHttpRequest
 * @author Henrik Lindqvist &lt;<a href="mailto:henrik.lindqvist@llamalab.com">henrik.lindqvist@llamalab.com</a>&gt;
 */
(function (w) {
  if (!w.XMLHttpRequest) {
    if (w.ActiveXObject) {
      w.XMLHttpRequest = function () {
        var fn = function (pid) {
          try { return new ActiveXObject(pid) } catch(e) {}
        };
        return fn('MSXML3.XMLHTTP')
            || fn("MSXML2.XMLHTTP.6.0")
            || fn("MSXML2.XMLHTTP.3.0")
            || fn("MSXML2.XMLHTTP")
            || fn("Microsoft.XMLHTTP");
      }
    }
  }
})(window);