function dtFootprint(sPagename, sAreas, sTarget, nILevel)
{
  var sParams = "?et=UsxvBE&v=2.4&et_easy=0&et_lpage=&et_trig=&et_se=0&et_cust=0&et_basket=&et_url=";
  var sPlugins = "";
  var nPlugin;


  if (!sPagename)
  {
    sPagename = location.pathname;
  };

  if (!sAreas)
  {
    sAreas = "";
  };

  if (!sTarget)
  {
    sTarget = ",,,0";
  };

  if (!nILevel)
  {
    nILevel = 0;
  };

  //
  // WATCHOUT: navigator.plugins ist *nicht* unter'm IE verfuegbar!
  //           Die Alternative, statt dessen ein ActiveX zu erzeugen,
  //           scheidet aber - mit Blick auf IE 7, den neuen
  //           Sicherheitseinstellungen, dem neuen "Informationbar"
  //           und Windows Vista - aus.
  //
  for (nPlugin = 0; nPlugin < navigator.plugins.length; ++nPlugin)
  {
    var oPlugin = navigator.plugins[nPlugin];


    if (oPlugin.name.length > 0)
    {
      if ((oPlugin.name != "Default Plugin") &&
          (oPlugin.name != "Default Plug-in") &&
          (oPlugin.name != "Mozilla Default Plug-in"))
      {
        if (sPlugins.indexOf(oPlugin.name) == -1)
        {
          if (sPlugins.length > 0)
          {
            sPlugins += ";";
          };

          sPlugins += oPlugin.name;
        };
      };
    };
  };

  sParams += ("&et_pagename=" + escape(sPagename));
  sParams += ("&et_areas=" + escape(sAreas));
  sParams += ("&et_target=" + escape(sTarget));
  sParams += ("&et_ilevel=" + nILevel.toString());
  sParams += ("&ref=" + escape(top.document.referrer));
  sParams += ("&p=" + escape(sPlugins));

  if (window.screen)
  {
    sParams += ("&swidth=" + screen.width.toString());
    sParams += ("&sheight=" + screen.height.toString());

    if (screen.pixelDepth)
    {
      sParams += ("&scolor=" + screen.pixelDepth.toString());
    }

    else
    {
      sParams += ("&scolor=" + screen.colorDepth.toString());
    };
  };

  sParams += ("&tc=" + new Date().getTime());

  new Image().src = "http://www.etracker.de/cnt.php" + sParams;
};