function aufklappen (id)
{
	document.getElementById(id).style.display = "";
	document.getElementById(id+'_linkauf').style.display = "none";
	document.getElementById(id+'_linkzu').style.display = "";
}

function zuklappen (id)
{
	document.getElementById(id+'_linkauf').style.display = "";
	document.getElementById(id).style.display = "none";
	document.getElementById(id+'_linkzu').style.display = "none";
}