<!--

// check browser version
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
  wha1 = new Image; wha1.src = "images/do1.jpg";
  por1 = new Image; por1.src = "images/portfolio1.jpg";
  abo1 = new Image; abo1.src = "images/about1.jpg";
  con1 = new Image; con1.src = "images/contact1.jpg";

  pfo1 = new Image; pfo1.src = "images/portfolio1.gif";

  // onMouseOut
  wha2 = new Image; wha2.src = "images/do2.jpg";
  por2 = new Image; por2.src = "images/portfolio2.jpg";
  abo2 = new Image; abo2.src = "images/about2.jpg";
  con2 = new Image; con2.src = "images/contact2.jpg";

  pfo2 = new Image; pfo2.src = "images/portfolio2.gif";
}

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

// -->