// Highly modified image swap function
// Copyright c Simple Software Technology
// http://www.simplesoftwaretechnology.com

// Setup for portrait swap
browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
ns3up = (browserName == "Netscape" && browserVer >= 3);
ie4up = (browserName.indexOf("Microsoft") >= 0 && browserVer >= 4);

// Portrait swap function
function doPic(imgName)
{
    if (ns3up || ie4up)
    {
        imgOn = ("" + imgName);
        document.mainpic.src = imgOn;
    }
}