function detailsVerdiensten(jaar,act)
{
	var detail = 'details_'+jaar;
	if(act == 'show')
	{
		newAct = 'hide';
		$(detail).show();
	}
	else if(act == 'hide')
	{
		newAct = 'show';
		$(detail).hide();
	}
	
	var linkDetail = 'link_'+jaar;
	$(linkDetail).update('<a href="javascript:detailsVerdiensten('+jaar+',\''+newAct+'\')">'+jaar+'</a>');
}