var NN3 = false;
image1= new Image();
image1.src = "images/start_objekte01.gif";
image1on = new Image();
image1on.src = "images/start_objekte02.gif";

image2= new Image();
image2.src = "images/start_ausstellungen01.gif";
image2on = new Image();
image2on.src = "images/start_ausstellungen02.gif";

image3= new Image();
image3.src = "images/start_vita01.gif";
image3on = new Image();
image3on.src = "images/start_vita02.gif";

function on3(name)   {

        document[name].src = eval(name + "on.src");

}

function off3(name)  {

        document[name].src = eval(name + ".src");

}

NN3 = true;



function on(name)  {

        if (NN3) on3(name);

}

function off(name)  {

        if (NN3) off3(name);


}