// Damit verschwindet der vorgegebene Text (value) aus einem Textfeld

function changeValue(def_val, sender) {
    if (sender.value == def_val) {
        sender.value = "";
    } else if (sender.value == "") {
        sender.value = def_val;
    }
}

// Switch-Fuktion zwischen zwei Stati
function showhide(id1, id2) {
    if (document.getElementById) {
        obj = document.getElementById(id1);
        obj2 = document.getElementById(id2);
        if (obj.style.display == "none") {
            obj.style.display = "";
            obj2.style.display = "none";
        }
        else {
            obj.style.display = "none";
            obj2.style.display = "";
        }
    }
}