function showLayer() {

document.getElementById("gruen").style.visibility = "visible";
document.getElementById("gruen-bg").style.visibility = "visible";

}


function hideLayer() {

document.getElementById("gruen").style.visibility = "hidden";
document.getElementById("gruen-bg").style.visibility = "hidden";

}



function showLayer2() {

document.getElementById("gruen2").style.visibility = "visible";
document.getElementById("gruen-bg2").style.visibility = "visible";

}


function hideLayer2() {

document.getElementById("gruen2").style.visibility = "hidden";
document.getElementById("gruen-bg2").style.visibility = "hidden";

}