browser = navigator.appName;
  browserVer = parseInt(navigator.appVersion);
    if (browser == "Netscape" && browserVer >= 3)
      preload = "true";
    else if (browser == "Microsoft Internet Explorer" && browserVer >=3)
      preload = "true";
    else
      preload = "false";
// set up graphics
if (preload == "true") 

{
  // onMouseOver
  sub1 = new Image; sub1.src = "/images/subscribe1.gif";
  bas1 = new Image; bas1.src = "/images/base.jpg";

  // onMouseOut
  sub2 = new Image; sub2.src = "/images/subscribe2.gif";
  ene2 = new Image; ene2.src = "/images/energy.jpg";
  hea2 = new Image; hea2.src = "/images/healthcare.jpg";
  pub2 = new Image; pub2.src = "/images/publishing.jpg";
  inb2 = new Image; inb2.src = "/images/inbound.jpg";
}

// swap images depending on cursor position over an href
function ImgChange(ImgRef,ImgName) {
  if (preload == "true") {
    document.images[ImgRef].src = eval(ImgName + ".src");
  }
}