二级垂直菜单消失时悬停

我有多级垂直菜单，当我尝试去第二级，二级菜单消失。二级垂直菜单消失时悬停

和二级菜单的高度（它工作正常的浏览器的一些旧版本）也是不等于第一级。我想这样的事情

enter image description here

我已经贴我现有的代码

http://codepen.io/anon/pen/Mwwdqd 虽然代码不能在codepen上工作，但可以将html，css复制到单独的文件中。

<!DOCTYPE html> 
<head> 
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css"> 
<link rel="stylesheet" type="text/css" href="style.css"> 
<meta name="viewport" content="width=device-width, initial-scale=1"> 
</head> 
<html lang="en"> 
<body> 
<div id="wrapper"> 
<div class="main-content"> 

<div class="topnav"> 
<div class="account"> 
<ul><li>Nathan Smith</li> 
</ul> 
</div> 

<div class="accountname"> 
<ul><li>My Account</li></ul> 
</div> 


<div class="logout"> 
<ul><li>Log Out</li></ul> 
</div> 

<div class="addtofav"><ul><li>Add to Favourties</li></ul></span></div> 

<div class="name"><ul><li>Voyager</li></ul></span></div> 


<div>zxczxc czx</div> 


</div> 
</div> 






<div class="sidebar"> 
<div class="left"> 
<div class="row col-xs-6 col-sm-3 col-md-2 logo"> 
<div class="imageinbottomtextontop"> 
<div class="titletextimage_image"> 
<a href="/content/count/en/default.html" target="_top"> 
<img title="COUNT" style="width:px; height:px;" src="images/logo.png" alt="COUNT"> 
</a> 
</div> 
</div> 
</div> 
</div> 


<div class="box"> 
    <div class="container-1"> 
     <span class="icon"><i class="fa fa-search"></i></span> 
     <input type="search" id="search" placeholder="Search..." /> 
    </div> 
</div> 

<div id="left-menu"> 

    <div> 
      <ul class="nav nav-pills nav-stacked mn-vnavigation"> 

       <li class="dropdown-submenu active"> 
        <a tabindex="-1" href="#">Client Advice</a> 


        <ul class="dropdown-menu"> 

         <li class="dropdown-submenu"><a tabindex="-1" href="#">Pre-advice</a></li> 
         <li class="dropdown-submenu"><a href="#">Strategy & Technical</a></li> 
         <li class="dropdown-submenu"><a href="#">Research</a></li> 
         <li class="dropdown-submenu active"> 
          <a href="#">APL & Products</a> 
          <ul class="dropdown-menu parent last-level"> 
           <li style=" border-bottom: 1px solid #ccc;"> 
            <a href="#"> 
             Approved Product List 
             <span aria-hidden="true" class="glyphicon glyphicon-plus menu-align"></span> 
             <span aria-hidden="true" class="glyphicon glyphicon-minus menu-align" style="display:none;"></span> 
            </a> 

            <ul class="child"> 
             <li style="padding:10px 15px;">Platforms</li> 
             <li style="padding: 10px 15px;">Managed Funds</li> 
             <li style="padding: 10px 15px;">Wealth Protection</li> 
             <li style="padding: 10px 15px;">Listed Securities</li> 
             <li style="padding: 10px 15px;">Wealth Protection</li> 
             <li style="padding: 10px 15px;">Listed Securities</li> 
             <li style="padding: 10px 15px;">Listed Securities</li> 
            </ul> 

           </li> 
           <li style=" border-bottom: 1px solid #ccc;"><a href="#">Model Portfolios</a></li> 
           <li style=" border-bottom: 1px solid #ccc;"><a href="#">Non-approved Products</a></li> 
          </ul> 
         </li> 
         <li class="dropdown-submenu"><a href="#">Implementation</a></li> 
         <li class="dropdown-submenu"><a href="#">Review</a></li> 
         <li class="dropdown-submenu"><a href="#">Execution Only</a></li> 
        </ul> 

       </li> 
       <li class="dropdown-submenu menu-align"><a href="#" >Personal Development</a></li> 
       <li class="dropdown-submenu menu-align "><a href="#" >Practice</a></li> 
       <li class="dropdown-submenu menu-align "><a href="#" >News</a></li> 
      </ul> 
     </div> 

</div> 







</div> 
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script> 
    <!-- Include all compiled plugins (below), or include individual files as needed --> 
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script> 
    <script> 
     $('.child').hide(); //Hide children by default 

     $('.parent').children().click(function() { 
      if (event.preventDefault) event.preventDefault() 
      else event.returnValue = false; 
      $(this).children('.child').slideToggle('slow'); 
      $(this).find('span').toggle(); 
     }); 
    </script> 
</body> 
</html>

来源

2015-05-04 F11

删除margin-left: 25px;从.dropdown-submenu > .dropdown-menu

它消失，因为当您试图使你离开维持悬停状态初始元素徘徊到你进入的利润率第二个菜单。改为使用padding。

使用开发人员工具检查元素（右键单击>检查）以更好地直观地看到元素周围的区域。

来源

2015-05-04 04:36:47 Max

感谢，它的固定和高度问题做什么？第二层次的高度与第一层菜单不一样。 – F11

二级垂直菜单消失时悬停

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