//all Sources: 2000 Theo Lustenberger

defImg = new Array();
highImg = new Array();
var countImages = 0;
var SelectedMenu = null;

function preloadImage(name,num,defaultImage) {
    if (defaultImage) {
        defImg[num] = new Image();
        defImg[num].src = name;
        countImages++;
    } else {
        highImg[num] = new Image();
        highImg[num].src = name;
    }
}

function register(num) {
    SelectedMenu = num;
    markSelected();
}

function markSelected() {
    upAll();
    if (SelectedMenu != null) {
        document.images[SelectedMenu+ImgOffset].src = highImg[SelectedMenu].src;
    }
}

function upAll() {
    for (i = 0; i < countImages; i++) {
        if (i != SelectedMenu) {
            document.images[i+ImgOffset].src = defImg[i].src;
        }
    }
}

function showImage(num,defaultImage) {
    if (defaultImage) {
        document.images[num+ImgOffset].src = defImg[num].src;
        markSelected();
    } else {
        document.images[num+ImgOffset].src = highImg[num].src;
    }
}