function AddBlogSerendipityActivity()
{
  var element = window.prompt("Gibt die URL zu deinem Blog an (ohne http:// allerdings mit / am ende.):", "de.xp-development.com/blog/");

  if(element == null || element == '')
  {
    if(element != null)
      alert('Gib deine Blog URL an.');
    return false;
  }
  else
  {
    window.external.AddService('http://de.xp-development.com/tools/activities/blog-serendipity.php?url=' + element);
    return false;
  }
  return false;
}

function AddBlogWordpressActivity()
{
  var element = window.prompt("Gibt die URL zu deinem Blog an (ohne http:// allerdings mit / am ende.):", "de.xp-development.com/blog/");

  if(element == null || element == '')
  {
    if(element != null)
      alert('Gib deine Blog URL an.');
    return false;
  }
  else
  {
    window.external.AddService('http://de.xp-development.com/tools/activities/blog-wordpress.php?url=' + element);
    return false;
  }
  return false;
}

function AddLookupWikipediaActivity()
{
  window.external.AddService('http://de.xp-development.com/tools/activities/lookup-wikipedia.php?lang=de');
}

function AddFindAmazonActivity()
{
  window.external.AddService('http://de.xp-development.com/tools/activities/find-amazon.php?lang=de');
}

function AddFindMicrosoftPressActivity()
{
  window.external.AddService('http://de.xp-development.com/tools/activities/find-microsoft-press.php?lang=de');
}

function AddTranslateLeoActivity(la)
{
  window.external.AddService('http://de.xp-development.com/tools/activities/translate-leo.php?lang=de&to=' + la);
}