if (document.images) {
	var on = new Image();
	on.src = "http://www.vdgatta.com/bred.gif"; 
	var off = new Image();
	off.src = "http://www.vdgatta.com/bblue.gif"; 
}
function On(name) {
	if (document.images) {
		document.images[name].src = on.src;
	}
}
function Off(name) {
	if (document.images) {
		document.images[name].src = off.src;
	}
}