if (document.images) {
  navtop1on = new Image();
  navtop1on.src = "/images/navtop1_on.gif";
  navtop1off = new Image();
  navtop1off.src = "/images/navtop1_off.gif";

  navtop2on = new Image();
  navtop2on.src = "/images/navtop2_on.gif";
  navtop2off = new Image();
  navtop2off.src = "/images/navtop2_off.gif";

  navtop3on = new Image();
  navtop3on.src = "/images/navtop3_on.gif";
  navtop3off = new Image();
  navtop3off.src = "/images/navtop3_off.gif";

  navtop4on = new Image();
  navtop4on.src = "/images/navtop4_on.gif";
  navtop4off = new Image();
  navtop4off.src = "/images/navtop4_off.gif";


  navleft1on = new Image();
  navleft1on.src = "/gnav/navleft1_on.gif";
  navleft1off = new Image();
  navleft1off.src = "/gnav/navleft1_on.gif";

  navleft2on = new Image();
  navleft2on.src = "/gnav/navleft2_on.gif";
  navleft2off = new Image();
  navleft2off.src = "/gnav/navleft2_off.gif";

  navleft2bon = new Image();
  navleft2bon.src = "/gnav/navleft2b_on.gif";
  navleft2boff = new Image();
  navleft2boff.src = "/gnav/navleft2b_off.gif";

  navleft3on = new Image();
  navleft3on.src = "/gnav/navleft3_on.gif";
  navleft3off = new Image();
  navleft3off.src = "/gnav/navleft3_off.gif";

  navleft4on = new Image();
  navleft4on.src = "/gnav/navleft4_on.gif";
  navleft4off = new Image();
  navleft4off.src = "/gnav/navleft4_off.gif";

  navleft5on = new Image();
  navleft5on.src = "/gnav/navleft5_on.gif";
  navleft5off = new Image();
  navleft5off.src = "/gnav/navleft5_off.gif";

  navleft6on = new Image();
  navleft6on.src = "/gnav/navleft6_on.gif";
  navleft6off = new Image();
  navleft6off.src = "/gnav/navleft6_off.gif";

  navleft7on = new Image();
  navleft7on.src = "/gnav/navleft7_on.gif";
  navleft7off = new Image();
  navleft7off.src = "/gnav/navleft7_off.gif";

  navleft8on = new Image();
  navleft8on.src = "/gnav/navleft8_on.gif";
  navleft8off = new Image();
  navleft8off.src = "/gnav/navleft8_off.gif";


  buynowon = new Image();
  buynowon.src = "/images/buynow_on.gif";
  buynowoff = new Image();
  buynowoff.src = "/images/buynow_off.gif";
}

function turnOn(imageName) {
  if (document.images) {
    document[imageName].src =
      eval(imageName + 'on.src');
  }
}

function turnOff(imageName) {
  if (document.images) {
    document[imageName].src =
      eval(imageName + 'off.src');
  }
}