<!-- Begin
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);

ns3up = (browserName == "Netscape" && browserVer >= 3);
ie4up = (browserName.indexOf("Microsoft") >= 0 && browserVer >= 4);

if (ns3up || ie4up) {
  image1 = new Image();
  image1.src = "images/lambda.jpg";
  image2 = new Image();
  image2.src = "images/lambdalite.jpg";
  image3 = new Image();
  image3.src = "images/newton4321.jpg";
  image4 = new Image();
  image4.src = "images/newton4321Lite.jpg";
  image5 = new Image();
  image5.src = "images/strange.JPG";
  image6 = new Image();
  image6.src = "images/strangeLite.jpg";
  image7 = new Image();
  image7.src = "images/fern.jpg";
  image8 = new Image();
  image8.src = "images/fernlite.jpg";
  image9 = new Image();
  image9.src = "images/lsys.jpg";
  image10 = new Image();
  image10.src = "images/lsysLite.jpg";
  image11 = new Image();
  image11.src = "images/jbrot.jpg";
  image12 = new Image();
  image12.src = "images/jbrotLite.jpg";  
  image13 = new Image();
  image13.src = "images/cusp1_15.jpg";
  image14 = new Image();
  image14.src = "images/cusp1_15Lite.jpg";  
  image15 = new Image();
  image15.src = "images/invert.jpg";
  image16 = new Image();
  image16.src = "images/invertLite.jpg";  
  image17 = new Image();
  image17.src = "images/escher42.jpg";
  image18 = new Image();
  image18.src = "images/escher42Lite.jpg";  
  image19 = new Image();
  image19.src = "images/smoutofthefire.jpg";
  image20 = new Image();
  image20.src = "images/smoutofthefireLite.jpg";  
}

function switchpic(img_name,img_src) {
if (ns3up || ie4up) {
document[img_name].src=img_src;
}
}
// End -->