function preload() {
        this.length = preload.arguments.length;
        for (var i = 0; i < this.length; i++) {
                this[i+1] = new Image();
                this[i+1].src = preload.arguments[i];
        }
          }
if (document.images) {
        var stuff = new preload(
         )
     }
isolate = (navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion.substring(0,1))<=3)
function select(i) {
        if (isolate != true) {
                var src = document.images[i].src;
                var off = src.lastIndexOf("-off");
                if (off != -1) {
                        var newsrc = src.substring(0,off) + "-on";
                        document.images[i].src = newsrc + ".gif";                       
                }
        }
}
function deselect(i) {
        if (isolate != true) {
                var src = document.images[i].src;
                var on = src.lastIndexOf("-on");
                if (on != -1) {
                        var newsrc = src.substring(0,on) + "-off" + src.substring(on + 3, src.length);
                        document.images[i].src = newsrc;                        
                }
        }
}