function expand_uniek (meer, verbergen) {
	var style_obj = document.getElementById('uniek').style;
	var current_style=style_obj.display;
	var current = true;
	if (current_style == 'none') {
		current = false;
	}

	if (current) {
		document.getElementById('uniek_link').innerHTML = meer+' ...';
		style_obj.display = 'none';
	} else {
		document.getElementById('uniek_link').innerHTML = verbergen+' ...';
		style_obj.display = 'block';
	}
}