/*set submenu invisible, is required if line element is empty -> only required due to IE*/
function onBodyLoad(){
var ul = document.getElementById("active_submenu");
if (ul != null && typeof(ul) !='undefined' ){
	var parent = ul.parentNode;
	var li = ul.childNodes[0];
	var height = parent.style.height;
	if (li == null && typeof(li) =='undefined' ){	
		ul.setAttribute('style', 'display:none');
		parent.removeChild(ul);
		parent.style.height =  height ;
	}
}
}