function menu_h(o,s) {
	if (s) { // menu over
		o.style.backgroundColor = '#FFFFFF';
		var img_a = o.getElementsByTagName('img');
		img_a[0].src = img_a[0].src.replace('blauw', 'rood');
	} else {
		o.style.backgroundColor = '';
		var img_a = o.getElementsByTagName('img');
		img_a[0].src = img_a[0].src.replace('rood', 'blauw');
	}
}

function set_item_id(id_s) {
	var element_o = document.getElementById(id_s);
	element_o.style.display = element_o.style.display ? '' : 'none';
}

function new_window(url) {
	window.open(url,'','toolbar=yes,location=yes,directories=yes,status=yes,menubar=yes,scrollbars=yes,copyhistory=yes,resizable=yes');
}