function toggleLayer( whichLayer )
{
   if ( document.getElementById )
   {
      // this is the way the standards work
      var style2 = document.getElementById( whichLayer ).style;
      style2.display = style2.display? "":"block";

      var link = document.getElementById( 'more_toggle' );
      if ( link != null )
      {
         link.innerHTML = ( link.innerHTML == "More..." ) ? "Less..." : "More...";
      }
   }
   else if ( document.all )
   {
      // this is the way old msie versions work
      var style2 = document.all[whichLayer].style;
      style2.display = style2.display? "":"block";

      var link = document.all["more_toggle"];
      if ( link != null )
      {
         link.innerHTML = ( link.innerHTML == "More..." ) ? "Less..." : "More...";
      }
   }
   else if ( document.layers )
   {
      // this is the way nn4 works
      var style2 = document.layers[whichLayer].style;
      style2.display = style2.display? "":"block";

      var link = document.layers["more_toggle"];
      if ( link != null )
      {
         link.innerHTML = ( link.innerHTML == "More..." ) ? "Less..." : "More...";
      }
   }
}