if (document.all)
{
        document.write("<style type='text/css'>");
        document.write(".block { display:none; }");
        document.write("</style>");
}
  function show(name)
  {
      var srcElement = document.getElementById(name);
      if(srcElement != null)
      {
          if(srcElement.style.display == "block")
          {
            srcElement.style.display= 'none';
          }
          else
          {
            srcElement.style.display='block';
          }
      }
  }