if (document.images) {
	var img1on = new Image();
	img1on.src = "../bilder/d_a.gif";

	var img1off = new Image();
	img1off.src = "../bilder/d.gif";
}

if (document.images) {
	var img2on = new Image();
	img2on.src = "../bilder/f_a.gif";

	var img2off = new Image();
	img2off.src = "../bilder/f.gif";
}

if (document.images) {
	var img3on = new Image();
	img3on.src = "../bilder/gb_a.gif";

	var img3off = new Image();
	img3off.src = "../bilder/gb.gif";
}

if (document.images) {
	var img4on = new Image();
	img4on.src = "../bilder/i_a.gif";

	var img4off = new Image();
	img4off.src = "../bilder/i.gif";
}

if (document.images) {
	var img5on = new Image();
	img5on.src = "../bilder/s_a.gif";

	var img5off = new Image();
	img5off.src = "../bilder/s.gif";
}



function imgon(imgname) {
	if (document.images) {
         	document.images[imgname].src = eval(imgname + "on.src");
                 }
            }

function imgoff(imgname) {
	if (document.images) {
         	document.images[imgname].src = eval(imgname + "off.src");
                 }
}