<!--

// 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
  nia1 = new Image; nia1.src = "images2/niagara1.jpg";
  pob1 = new Image; pob1.src = "images2/pob1.jpg";
  mad1 = new Image; mad1.src = "images2/madeline1.jpg";

  // onMouseOut
  nia2 = new Image; nia2.src = "images2/niagara2.gif";
  pob2 = new Image; pob2.src = "images2/pob2.gif";
  mad2 = new Image; mad2.src = "images2/madeline2.gif";
}

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

// -->