function showDown(t, i, c, s) {
  hilfefensterShow();
  //doRequest('ajax/help.php', 'help='+id);
  doRequest('../ajax/down.php', 't='+t+'&i='+i+'&c='+c+'&s='+s);
}

function hilfefensterShow() {
  var wartediv = document.getElementById('down');
  //wartediv.innerHTML='<p align="center"><img src="images/loading.gif"/></p>';
  wartediv.style.display='block';
}