function showHideLayers() { //v9.0
  var i,p,v,obj,args=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')?'block':(v=='hide')?'none':v; 
	}
    obj.display=v; }
  }
}