jquery 遮罩层效果实现的导航菜单

/**
* 遮罩层效果 导航菜单
* by www.jbxue.com
*/
$(function() {
var $oe_menu= $('#oe_menu');
var $oe_menu_items= $oe_menu.children
('li');
var $oe_overlay= $('#oe_overlay');
                $oe_menu_items.bind('mouseenter',function(){
var $this = $(this);
$this.addClass('slided selected');
$this.children('div').css('z-
index','9999').stop(true,true).slideDown(200,function(){
$oe_menu_items.not
('.slided').children('div').hide();
$this.removeClass('slided');
});
}).bind('mouseleave',function(){
var $this = $(this);
$this.removeClass('selected').children
('div').css('z-index','1');
});
$oe_menu.bind('mouseenter',function(){
var $this = $(this);
$oe_overlay.stop(true,true).fadeTo(200,
0.6);
$this.addClass('hovered');
}).bind('mouseleave',function(){
var $this = $(this);
$this.removeClass('hovered');
$oe_overlay.stop(true,true).fadeTo(200,
0);
$oe_menu_items.children('div').hide();
})
});