function show(text)
{
   obj = eval(text);
   if (document.layers)
   {
      obj.visibility = "show";
   }
   if (document.all)
   {
      obj.style.visibility = "visible";
   }
}

function hide(text)
{
   obj = eval(text);
   if (document.layers)
   {
      obj.visibility = "hide";
   }
   if (document.all)
   {
      obj.style.visibility = "hidden";
   }
}