var image_dir="http://www.weltfokus.de/images";

function add_tool(icon, name, url) {
  document.write('<span id="AdButton-' + icon + '"><a href="' + url + '" title="' + name +'" target="_blank"><img src="' + image_dir + '/' + icon + '.png" alt="' + name + ' icon" style="border:none;"/></a></span> ');
}
function add_all() {
  var title = encodeURIComponent(document.title);
  var url = encodeURIComponent(document.URL);
  add_tool('chip2', 'Chip', 'http://wissenstest.chip.de/');
}

add_all();