if (document.images) { 
     img1on = new Image ();
     img1on.src = "rlo_a.gif";
     img1off = new Image ();
     img1off.src = "nav_a.gif";
 
     img2on = new Image ();
     img2on.src = "rlo_f.gif";
     img2off = new Image ();
     img2off.src = "nav_f.gif";

     img3on = new Image ();
     img3on.src = "rlo_m.gif";
     img3off = new Image ();
     img3off.src = "nav_m.gif";

     img4on = new Image ();
     img4on.src = "rlo_s.gif";
     img4off = new Image ();
     img4off.src = "nav_s.gif";

     img5on = new Image ();
     img5on.src = "rlo_r.gif";
     img5off = new Image ();
     img5off.src = "nav_r.gif";
		
		 img6on = new Image ();
     img6on.src = "rlo_h.gif";
     img6off = new Image ();
     img6off.src = "nav_h.gif";

     img7on = new Image ();
     img7on.src = "rlo_e.gif";
     img7off = new Image ();
     img7off.src = "nav_e.gif";
} 

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}