//Generate a random image
browser = (((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4 )) || ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4 )))

//preload mouse rollovers
function preload() {
        if (document.images){
                var ar = new Array();
                var args = preload.arguments;
                for (var i = 0; i < args.length; i++) {
                        ar[i] = new Image();
                        ar[i].src = args[i];
                }
        }
}
//onMouseOver code
function imgOver(imgName){
	if(browser){
		document[imgName].src = "/images/" + imgName + "_on.gif";
	}
}
//onMouseOut code
function imgOff(imgName){
	if(browser){
		document[imgName].src = "/images/" + imgName + "_off.gif";
	}
}