/**********************************************************************
 * 
 * author: YOSHIDA Hiroki
 * 
 * version: 0.20090701
 *
 * reference: http://www.kriesi.at/archives/create-a-multilevel-dropdown-menu-with-css-and-improve-it-via-jquery
 *
 **********************************************************************/


function dropmenu() {
	$("#nav ul").css({display: "none"}); // Opera Fix

	$("#nav li").hover(function() {
		$(this).find('ul:first:hidden').css({visibility: "visible", display: "none"}).animate({height: "show", opacity: "show"}, 400);
	}, function() {
//		$(this).find('ul:first:visible').animate({height: "hide", opacity: "hide"}, 400);
		$(this).find('ul:first').css({visibility: "hidden"});
	});
}

$(document).ready(function() {
	dropmenu();
});