<!-- 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/layers2.jpg";
  image2 = new Image();
  image2.src = "images/layers2Lite.jpg";
  image3 = new Image();
  image3.src = "images/tutorial_enhanced2.jpg";
  image4 = new Image();
  image4.src = "images/tutorial_enhanced2Lite.jpg";
  image5 = new Image();
  image5.src = "images/smsimple.jpg";
  image6 = new Image();
  image6.src = "images/smsimpleLite.jpg";
  image7 = new Image();
  image7.src = "images/smPeppers.jpg";
  image8 = new Image();
  image8.src = "images/smPeppersLite.jpg";
  image9 = new Image();
  image9.src = "images/smAttr.jpg";
  image10 = new Image();
  image10.src = "images/smAttrLite.jpg";
  image11 = new Image();
  image11.src = "images/smoutofthefire.jpg";
  image12 = new Image();
  image12.src = "images/smoutofthefireLite.jpg";
  image13 = new Image();
  image13.src = "images/quat.jpg";
  image14 = new Image();
  image14.src = "images/quatLite.jpg";
  image15 = new Image();
  image15.src = "images/challenge1_reb.jpg";
  image16 = new Image();
  image16.src = "images/challenge1_rebLite.jpg";
  image17 = new Image();
  image17.src = "images/flowersnbubbles.jpg";
  image18 = new Image();
  image18.src = "images/flowersnbubblesLite.jpg";
}

function switchpic(img_name,img_src) {
if (ns3up || ie4up) {
document[img_name].src=img_src;
}
}
// End -->