function toggle() {
        var ele = document.getElementById("postkasten");
        var text = document.getElementById("displayText");

        if(ele.style.display == "block") {
                    ele.style.display = "none";
                text.innerHTML = "Postkasten";
          }
        else {
                ele.style.display = "block";
                text.innerHTML = "Postkasten aus";
             }
}


function toggle2() {
        var ele2 = document.getElementById("radiosender");
        var text2 = document.getElementById("displayRadio");

        if(ele2.style.display == "block") {
                    ele2.style.display = "none";
                text2.innerHTML = "Radiosender";
          }
        else {
                ele2.style.display = "block";
                text2.innerHTML = "Radio ausblenden";
        }
}