var layer_names = new Array
        (/*"whatsnewlayer",*/"librarylayer","foundrylayer","serviceslayer","contactlayer");
	function show_layer (layer)
	{
	   if (navigator.appName == 'Netscape' && document.layers != null)
	   {
	     document.layers[layer].visibility = 'show';
	   }
	   else if (document.all != null) //IE
	   {
	     document.all[layer].style.visibility = 'visible';
	   }
	   hide_other_layers (layer);
	}
	function hide_other_layers (layer)
	{
	  var layerArray;
	  for (i=0; i<layer_names.length; i++)
	  {
	       if (layer_names[i] == layer)
		 continue;
	       var theObj;
	       if (navigator.appName == "Netscape" && document.layers != null)
	       {
		 document.layers[layer_names[i]].visibility = "hide";
	       }
	       else if (document.all != null) //IE
	       {
		 document.all[layer_names[i]].style.visibility = "hidden";
	       }
	  }
	}
	function hideAll ()
	{
		hide_other_layers ( "nolayer" );
	}