Event.observe(window, 'load', function(event) {
	// Items in hoofdmenu en alle tr's krijgen class zodat hover werkt in ie6
	$$('ul#menu li.level1').each( function(el) {
		Event.observe( el, 'mouseover', function() {
			el.addClassName('hover');
		});
		Event.observe( el, 'mouseout', function() {
			el.removeClassName('hover');
		});
	});
});