var fJS = false;
var bn = navigator.appName;
var vn = navigator.appVersion.substring(0,1);
var Menge = 8;
var Code = "b0";
menuNor = new Array(Menge);
menuSel = new Array(Menge);

function init() {
	if (((bn == "Netscape") && (vn >= "3")) ||
	    ((bn == "Microsoft Internet Explorer") && (vn >= "4"))) {
		// Btns vorladen.
		for (i=1; i<=Menge; i++) {		
			menuNor[i] = new Image();
			menuNor[i].src = "img/" + Code + i + "n.gif";
			menuSel[i] = new Image();
			menuSel[i].src = "img/" + Code + i + "f.gif";
		}
		fJS = true;
	}
}
function Focus(idx) {
	// Btn fokussiert darstellen.
	if (fJS) {
		var s = "b"+idx;
		document.images[s].src = menuSel[idx].src;
	}
}
function Blur(idx) {
	// Btn normal darstellen.
	if (fJS) {
		var s = "b"+idx;
		document.images[s].src = menuNor[idx].src;
	}
}