function change(Bildname, Dateiname) {

   if (document.images) {
      document.images[Bildname].src = Dateiname }
}
function winopen(url, width, height)
{
	if (height == null)
	{
		height = "550";
	}
	begriff = window.open(url,"_blank","top=30,left=50,toolbar=no,width="+width+",height="+height+",directories=no,status=no,scrollbars=yes,resize=no,menubar=no");
	begriff.focus();
	return;
}
function gehezu(url){
	if (url == ""){
		document.karl.reset();
		document.karl.ziel.blur();
		return;
	}
	else {
		document.location.href = url;
		document.karl.reset();
		document.karl.ziel.blur();
	}
}
function groesse() {
	var dynheight_left = document.getElementById("navi-hoch").offsetHeight;
	var dynheight_right = document.getElementById("content").offsetHeight;
	var dyn_abstand = document.getElementById("abstand").offsetHeight;
	if (dynheight_left > dynheight_right){
		dynheight=dynheight_left;
		dyn_abstand_ber=100;
	}
	else{
		dynheight=dynheight_right;
		dyn_abstand_ber=dynheight_right - dynheight_left+105;
	}
	document.getElementById("navi-hoch").style.height=dynheight+"px";
	document.getElementById("content").style.height=dynheight+"px";
	document.getElementById("abstand").style.height=dyn_abstand_ber+"px";
}