function impressum(zahl) {
    switch (zahl) {
        case 1:$('impressuminhalt').style.visibility='visible';  break;
        case 2:$('impressuminhalt').style.visibility='hidden'; break;

        default: break;
    }
}

function loadpic (nummer) {
    switch (nummer) {
        case 1:$('svimg').src='pics/sach2.jpg'; break;
        case 2:$("svimg").src='pics/sach1.jpg'; break;
        case 3:$("itimg").src='pics/it2.jpg'; break;
        case 4:$("itimg").src='pics/it1.jpg'; break;
        case 5:$("maimg").src='pics/medien2.jpg'; break;
        case 6:$("maimg").src='pics/medien1.jpg'; break;
    }
}