<!-- Begin

browserName = navigator.appName;   // detect browser 
         browserVer = parseInt(navigator.appVersion);
             if (browserName == "Netscape" && browserVer >= 3) browserVer = "1";
                 else if (browserName == "Microsoft Internet Explorer" && browserVer == 4) browserVer = "1";
             else browserVer = "2";

//preload images:
if (browserVer == 1) { 
dfnavbar=new Image ();
dfnavbar.src="images/dfnavbar.gif";

dfnavbar_home=new Image ();
dfnavbar_home.src="images/dfnavbar_home.gif";

dfnavbar_photos=new Image ();
dfnavbar_photos.src="images/dfnavbar_books.gif";

dfnavbar_news=new Image ();
dfnavbar_news.src="images/dfnavbar_links.gif";

dfnavbar_links=new Image ();
dfnavbar_links.src="images/dfnavbar_members.gif";

dfnavbar_links=new Image ();
dfnavbar_links.src="images/dfnavbar_guests.gif";

dfnavbar_links=new Image ();
dfnavbar_links.src="images/dfnavbar_funstuff.gif";

}

<!-- Begin
function movepic(img_name,img_src) {
if (browserVer == 1) {
document[img_name].src=img_src;
}}
// End -->