if (document.images) {            // Active Images

            eingangbildon = new Image();
            eingangbildon.src = "_img/eingang2_2.jpg";
            eingangobjekton = new Image();
            eingangobjekton.src = "_img/eingang3_2.jpg";
            weber1on = new Image();
            weber1on.src = "_img/weber1_2.jpg";
            weber2on = new Image();
            weber2on.src = "_img/weber2_2.jpg";
            storzon = new Image();
            storzon.src = "_img/storz_2.jpg";
            flur1on = new Image();
            flur1on.src = "_img/flur1_2.jpg";
            breitensteinon = new Image();
            breitensteinon.src = "_img/breitenstein_2.jpg";
            backon = new Image();
            backon.src = "_img/back_2.gif";
            nexton = new Image();
            nexton.src = "_img/next_2.gif";

            eingangbildoff = new Image();
            eingangbildoff.src = "_img/eingang2_1.jpg";
            eingangobjektoff = new Image();
            eingangobjektoff.src = "_img/eingang3_1.jpg";
            weber1off = new Image();
            weber1off.src = "_img/weber1_1.jpg";
            weber2off = new Image();
            weber2off.src = "_img/weber2_1.jpg";
            storzoff = new Image();
            storzoff.src = "_img/storz_1.jpg";
            flur1off = new Image();
            flur1off.src = "_img/flur1_1.jpg";
            breitensteinoff = new Image();
            breitensteinoff.src = "_img/breitenstein_1.jpg";
            backoff = new Image();
            backoff.src = "_img/back_1.gif";
            nextoff = new Image();
            nextoff.src = "_img/next_1.gif";

        }

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}