function getElement(id) {
		return document.getElementById(id);
}

function ShowElement(element){
	element.style.display="block";
}

function HideElement(element){
	element.style.display="none";
}

function switchVisibleHidden(Id){	
	if (eval('getElement("'+Id+'")').style.display=="none" || eval('getElement("'+Id+'")').style.display==0){
		ShowElement(eval('getElement("'+Id+'")'));
	}
	else {
		HideElement(eval('getElement("'+Id+'")'));
	}	
}

function fenster (url,name,width,height) {
  nw = window.open(url,name,"width="+width+",height="+height+",status=no,toolbar=no,resizable=no,scrollbars=no");
  nw.focus();
}