<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style type="text/css"> * { margin: 0; padding: 0; } ul { list-style: none; } .wrap { width: 330px; height: 30px; margin: 100px auto 0; padding-left: 10px; background-image: url(imgs/bg.jpg); } .wrap li { background-image: url(imgs/libg.jpg); } .wrap>ul>li { float: left; margin-right: 10px; position: relative; } .wrap a { display: block; height: 30px; width: 100px; text-decoration: none; color: #000; line-height: 30px; text-align: center; } .wrap li ul { position: absolute; top: 30px; display: none; } </style> <script src="../jquery-1.12.4.js"></script> <script> $(function () { var $li = $(".wrap>ul>li") //给li注册鼠标经过事件，让自己的ul显示出来 $li.mouseenter(function () { //找到所有的儿子，并且还得是ul $(this).children("ul").show();
})
$li.mouseleave(function () {
$(this).children("ul").hide();
})
}); </script> </head> <body> <div class="wrap"> <ul> <li> <a href="javascript:void(0);">一级菜单1</a> <ul class="ul"> <li><a href="javascript:void(0);">二级菜单11</a></li> <li><a href="javascript:void(0);">二级菜单12</a></li> <li><a href="javascript:void(0);">二级菜单13</a></li> </ul> </li> <li> <a href="javascript:void(0);">一级菜单2</a> <ul> <li><a href="javascript:void(0);">二级菜单21</a></li> <li><a href="javascript:void(0);">二级菜单22</a></li> <li><a href="javascript:void(0);">二级菜单23</a></li> </ul> </li> <li> <a href="javascript:void(0);">一级菜单3</a> <ul> <li><a href="javascript:void(0);">二级菜单31</a></li> <li><a href="javascript:void(0);">二级菜单32</a></li> <li><a href="javascript:void(0);">二级菜单33</a></li> </ul> </li> </ul> </div> </body> </html>