browserName = navigator.appName;
browserVersion = parseInt(navigator.appVersion);
if (browserName == "Netscape" && browserVersion >= 3) version = "nav3";
else if (browserName == "Microsoft Internet Explorer" && browserVersion >= 4) version = "nav3";
else version= "nav2";

if (version == "nav3") {
imageList = new Array();
var i = 0;
imageList[i++] = "<IMG SRC='ran/01.jpg' + ALT='' WIDTH='252' HEIGHT='400' BORDER='0'>";
imageList[i++] = "<IMG SRC='ran/02.jpg' + ALT='' WIDTH='252' HEIGHT='400' BORDER='0'>";
imageList[i++] = "<IMG SRC='ran/03.jpg' + ALT='' WIDTH='252' HEIGHT='400' BORDER='0'>";
imageList[i++] = "<IMG SRC='ran/04.jpg' + ALT='' WIDTH='252' HEIGHT='400' BORDER='0'>";
var rand = Math.round(Math.random() * (imageList.length - 1));
}