我在编程方面非常缺乏经验。但我做了一个网站，作为工作的组合。我有单独的 PDF 文件，这些文件加载到您可以滚动浏览的 iframe(放置在 ap div 中)中。该站点是 www.michaellautner.com，架构页面是出现问题的地方(如果您想查看设置)。顶部的菜单是出现问题的地方。现在我放弃了那个，因为它是我在 Dreamweaver 中制作的快捷菜单，显然不再受支持了？我在一个可以插入的免费 CSS 菜单创建器网站上创建了一个新的菜单栏。问题是标题为“学校”的菜单下拉到 iframe 后面并且看不到。在 Firefox 中工作正常，但在 IE10 中不起作用。这是代码...断断续续地为此工作了将近 2 周，但没有从菜单站点获得任何帮助。我也玩过 z-index 但没有成功，并尝试将 div 位置更改为相对位置，但它弄乱了整个页面。任何帮助都会很棒...
(我突出显示了菜单的 div 和 iframe 的 div)
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**<div id="apDiv3"><iframe src="file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/3D%20Models%20and%20Renderings/index.html" style="border:0px;" name="archi_frame1" scrolling="auto" frameborder="no" align="center" height ="650px" width ="950px">
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<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/3D%20Models%20and%20Renderings/index.html' target="archi_frame1"><span>3D Models & Renderings</span></a></li>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Subpages/commercial/commercial.htm'><span>Commercial</span></a></li>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Subpages/residential/residential.htm'><span>Residential</span></a></li>
<li class='has-sub last'><a href='#'><span>School</span></a>
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<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/School/Boathouse/index.html'target="archi_frame1"><span>Boathouse</span></a></li>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/School/Chippewa%20Building/index.html'target="archi_frame1"><span>Chippewa Building</span></a></li>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/School/Light%20Gallery/index.html'target="archi_frame1"><span>Light Gallery</span></a></li>
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最佳答案
看了下，UL需要的是z-index而不是cssmenu，我在代码里加了 http://jsfiddle.net/N9VAX/1/
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**<div id="apDiv3"><iframe src="file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/3D%20Models%20and%20Renderings/index.html" style="border:0px;" name="archi_frame1" scrolling="auto" frameborder="no" align="center" height ="650px" width ="950px">
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<div id="apDiv4"><a href="mailto:mlautner03@yahoo.com" target="_blank">mike@michaellautner.com</a></div>
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<ul>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/3D%20Models%20and%20Renderings/index.html' target="archi_frame1"><span>3D Models & Renderings</span></a></li>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Subpages/commercial/commercial.htm'><span>Commercial</span></a></li>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Subpages/residential/residential.htm'><span>Residential</span></a></li>
<li class='has-sub last'><a href='#'><span>School</span></a>
<ul style="z-index:99;">
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/School/Boathouse/index.html'target="archi_frame1"><span>Boathouse</span></a></li>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/School/Chippewa%20Building/index.html'target="archi_frame1"><span>Chippewa Building</span></a></li>
<li><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/School/Light%20Gallery/index.html'target="archi_frame1"><span>Light Gallery</span></a></li>
<li class='last'><a href='file:///C:/Users/Mike/Desktop/Graphic%20Design%20Projects/Website_mlautner/Images/Architectural%20Images/School/Museum/index.html' target="archi_frame1"><span>Museum</span></a></li>
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</li>
</ul>
</div> </div>**
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关于CSS 菜单卡在 iframe 后面，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17607262/