// Blendet ein Textelement langsam ein
function fade(ref, time) {
    if (time == 0) {
	ref.style.opacity = 0.0;
        ref.style.display = "block";	
    }
    if (ref.style.display == "block" && time <= 10) {
       ref.style.opacity = time / 10;
       setTimeout(function() { fade(ref, ++time); }, 20);
    }
}