//popup functie

function venster(pagina)
{
	window.open(pagina,"venstertje","width=750, height=600, menubar=no,status=no,toolbar=no,scrollbars=yes");
}

//expanding menu functie

function expand(list)
{
	var listElementStyle=document.getElementById(list).style;
	if (listElementStyle.display=="none")
		{
			listElementStyle.display="block";
			listElementStyle.liststyleimage="../../img/min.jpg";
			
		}
	else
		{
			listElementStyle.display="none";
			listElementStyle.liststyleimage="../../img/plus.jpg";
		}
}