//
// phpOpenTracker - The Website Traffic and Visitor Analysis Solution
//
// Copyright 2000 - 2005 Sebastian Bergmann. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

//modified by Markus Breitschuh, informedia GmbH

if (typeof(client_id) != 'number') {
	var client_id = 1;
}
if (typeof(config_dir) != 'string') {
	var config_dir = '/pot';
}
if (typeof(doc_title) != 'string') {
	var doc_title = document.title;
}

// Taken from http://www.jan-winkler.de/hw/artikel/art_j02.htm

function base64_encode(decStr) {
  var base64s = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
  var bits;
  var dual;
  var i = 0;
  var encOut = '';

  while(decStr.length >= i + 3) {
    bits = (decStr.charCodeAt(i++) & 0xff) <<16 |
           (decStr.charCodeAt(i++) & 0xff) <<8 |
            decStr.charCodeAt(i++) & 0xff;

    encOut += base64s.charAt((bits & 0x00fc0000) >>18) +
              base64s.charAt((bits & 0x0003f000) >>12) +
              base64s.charAt((bits & 0x00000fc0) >> 6) +
              base64s.charAt((bits & 0x0000003f));
  }

  if(decStr.length -i > 0 && decStr.length -i < 3) {
    dual = Boolean(decStr.length -i -1);

    bits = ((decStr.charCodeAt(i++) & 0xff) <<16) |
           (dual ? (decStr.charCodeAt(i) & 0xff) <<8 : 0);

    encOut += base64s.charAt((bits & 0x00fc0000) >>18) +
              base64s.charAt((bits & 0x0003f000) >>12) +
              (dual ? base64s.charAt((bits & 0x00000fc0) >>6) : '=') +
              '=';
  }

  return(encOut);
}

var resolution = window.screen.width + 'x' +
                 window.screen.height + 'x' +
                 window.screen.colorDepth + 'bit';

document.write(
  '<img src="'				+ config_dir + '/image.php?' +
  'client_id='              + client_id + '&' +
  'document='               + escape(doc_title) + '&' +
  'document_url='           + base64_encode(document.URL) + '&' +
  'referer='                + base64_encode(document.referrer) + '&' +
  'add_data[]=resolution::' + resolution +
  '" alt="" width="1" height="1" />'
);