var session;
var base64_keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

var screen_x	= screen.width;
var screen_y	= screen.height;
var os			= navigator.platform;
var img = document.createElement("img");
var params = "session=" + session + "&screen_x=" + screen_x + "&screen_y=" + screen_y;
params = base64_encode(params);
img.src = "http://www.x65.de/webstats/input/webstats_js.php?params=" + params;
document.getElementsByTagName("body")[0].appendChild(img);

function base64_encode(input) {
   var output = "";
   var chr1, chr2, chr3;
   var enc1, enc2, enc3, enc4;
   var i = 0;

   do {
      chr1 = input.charCodeAt(i++);
      chr2 = input.charCodeAt(i++);
      chr3 = input.charCodeAt(i++);

      enc1 = chr1 >> 2;
      enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
      enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
      enc4 = chr3 & 63;

      if (isNaN(chr2)) {
         enc3 = enc4 = 64;
      } else if (isNaN(chr3)) {
         enc4 = 64;
      }

      output = output + base64_keyStr.charAt(enc1) + base64_keyStr.charAt(enc2) +
         base64_keyStr.charAt(enc3) + base64_keyStr.charAt(enc4);
   } while (i < input.length);

   return output;
}