function MM_showHideLayers() { //v9.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) 
  with (document) 
   if (getElementById && ((obj=getElementById(args[i]))!=null))
   { v=args[i+2];
    if (obj.style)
     { obj=obj.style; v=(v=='show')?'':(v=='hide')?'none':v;
     }
    obj.display=v;
   }
}