document.getElementById("leftsite").style.height = Hoehe-10+corrY+"px";
document.getElementById("main").style.height = Hoehe-113+corrY+"px";
document.getElementById("main").style.width = Weite-455+corrX+"px";
document.getElementById("rightsite").style.height = Hoehe-110+corrY+"px";
document.getElementById("rightsite").style.height = Hoehe-110+corrY+"px";