function CreateHttpConnection()
  {
    var http_request = false;
    if (window.XMLHttpRequest)
    {
      try {
        http_request = new XMLHttpRequest();
      }
      catch (e)
      {
        http_request = false;
      }
    }
    else
    {
      if (window.ActiveXObject)
      {
        try
        {
          http_request = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (e)
        {
          http_request = false;
        }
      }
      else
      {
        http_request = false;
      }
    }
    return http_request;
  }
  
  function showNewsletter()
  {
    tb_show("", "../index.php?method=form&plugin=newsletter&categ=1&height=40&width=250", "");
  }