function toggle(id) {
   if (document.getElementById) { // W3C
      obj = document.getElementById(id).style;
   }
   else if (document.layers) { // Netscape 4
      obj = document.layers[id];
   }
   else if (document.all) { // IE 4/5
      obj = document.all[id].style;
   }
   obj.display = (obj.display=='inline') ? 'none' : 'inline';

}