if (typeof(_clk) == 'undefined') {
  function _clk(context) {
    var xmlHttp = false;
    if (typeof(XMLHttpRequest) != 'undefined') {
      xmlHttp = new XMLHttpRequest();
    } else {
      try {
        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
      } catch(ignored) {
        try {
          xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        } catch(ignored) {
        }
      }
    }
    if (xmlHttp) {
      xmlHttp.open('GET', '/site/servlet/tracker.xml?m=h&c='+escape(context), true);
      xmlHttp.send(null);
    } else {
      new Image().src='/site/servlet/tracker.gif?m=h&c='+escape(context)+'&p='+(new Date().getTime().toString());
    }
    return true;
  }
}