var current;

$(document).ready(function() {
	$('#menu a').click(function() {
		openMenu(this);
	});
});

function openMenu(openel) {
	if (current != openel) {
		$(current).parent().find('div').slideUp("slow");
		$(openel).parent().find('div').slideDown("slow");
		current = openel;
	} else {
		$(openel).parent().find('div').slideUp("slow");
		current = 'a';
	}
}