IE8中的多级弹出菜单出现问题
Problem with multi level pop out menu in IE8
我在本教程中制作了一个多级弹出菜单，这是我正在处理的页面。
它在IE8之外的所有浏览器中都运行得很好，第三层隐藏在第二层之后。
有人能看到问题出在哪里吗？
这是代码：
<div id="menu">
<div id="menu-edge"></div>
<ul id="nav">
<li class="top"><a class="top_link" href="http://www.match.ac.uk">Home</a></li>
<li class="top"><a class="top_link" href="/about.php">About</a>
<ul class="sub" style="margin-left:0px;">
<li><a class="fly" href="/theteam.php">The Team</a>
<ul class="sub-popout">
<li><a href="/researchers.php">Researchers</a></li>
<li><a href="/management.php">Management</a></li>
<li><a href="/investigators.php">Investigators</a></li>
<li><a href="/students.php">PhD Students</a></li>
</ul>
</li>
<li><a href="/vision.php">Our Vision</a></li>
<li><a href="/strategy.php">Strategy</a></li>
<li><a href="/achievements.php">Achievements</a></li>
<li><a href="/literature.php">Literature</a></li>
</ul>
</li>
<li class="top"><a class="top_link" href="/membership.php">Membership</a>
<ul class="sub" style="margin-left:0px;">
<li><a href="/level1.php">Level 1 - Micro</a></li>
<li><a href="/level2.php">Level 2 - SME/Division</a></li>
<li><a href="/level3.php">Level 3 - Large</a></li>
<li><a href="/level1.php">Level 4 - Macro</a></li>
<li><a href="/additional.php">Additional Services</a></li>
</ul>
<li class="top"><a class="top_link" href="/research.php">Research</a>
<ul class="sub" style="margin-left:0px;">
<li><a href="/projecti.php">Project I - Tools for Industry</a></li>
<li><a href="/projectii.php">Project II - Economic Evaluation</a></li>
<li><a href="/projectiii.php">Project III - User Needs</a></li>
<li><a href="/projectiv.php">Project IV - Implementation Issues</a></li>
</ul>
<li class="top"><a class="top_link" href="/publications.php">Publications</a>
<ul class="sub" style="margin-left:0px;">
<li><a href="/2011.php">2011</a></li>
<li><a href="/2010.php">2010</a></li>
<li><a href="/2009.php">2009</a></li>
<li><a href="/2008.php">2008</a></li>
<li><a href="/2007.php">2007</a></li>
<li><a href="/2006.php">2006</a></li>
<li><a href="/2005.php">2005</a></li>
<li><a href="/2004.php">2004</a></li>
<li><a href="/deliverables.php">Deliverables</a></li>
<li><a href="/innovative-manufacturing.php">Innovative Manufacturing</a></li>
</ul>
<li class="top"><a class="top_link" href="/news-events.php">News & Events</a>
<ul class="sub" style="margin-left:0px;">
<li><a href="/news.php">News</a></li>
<li><a href="/events.php">Events</a></li>
<li><a href="/training.php">Training & Workshops</a></li>
</ul>
<li class="top"><a class="top_link" href="/partners.php">Partners</a>
<li class="top"><a class="top_link" href="/contact.php">Contact Us</a>
</ul>
</div>
CSS：
#menu {
float:right;
height:33px;
background-color:#00B1E8;
margin-top:14px;
width:749px;
}
#nav {
padding:5px 0 0 0;
margin:0 0 0 79px;
list-style:none;
height:27px;
background-color:#00B1E8;
position:relative;
z-index:500;
font-size:13px;
}
#nav li.top {display:block; float:left; height:33px;}
a.no-sub {
color:#ffffff;
display:block; float:left; height:33px; text-decoration:none; margin-right: 20px; cursor:pointer;
}
a.no-sub:hover {
color:#1D71B8;
display:block; float:left; height:33px; text-decoration:none; margin-right: 20px; cursor:pointer;
}
#nav li a.top_link {display:block; float:left; height:33px; color:#fff; text-decoration:none; margin-right: 20px; cursor:pointer;}
#nav li a.top_link span {float:left; display:block; padding:0 24px 0 12px; height:35px; background: url(three_0.gif) right top no-repeat;}
#nav li a.top_link span.down {float:left; display:block; padding:0 24px 0 12px; height:35px; background: url(three_0a.gif) no-repeat right top;}
#nav li:hover a.top_link {color:#1D71B8;}
#nav li:hover a.top_link span {background:url(three_1.gif) no-repeat right top;}
#nav li:hover a.top_link span.down {background:url(three_1a.gif) no-repeat right top;}
/* Default list styling */
#nav li:hover {position:relative; z-index:200;}
#nav li:hover ul.sub {
left:1px;
top:26px;
padding:3px;
white-space:nowrap;
width:250px;
height:auto;
z-index:300;
background:transparent;
filter:progid:DXImageTransform.Microsoft.gradient(startColorStr=#00B1E8,endColorStr=#00B1E8);
-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr=#00B1E8,endColorstr=#00B1E8)";
zoom: 1;
background-color: rgba(54, 169, 225, 0.8);
}
#nav li:hover ul.sub li
{display:block; height:20px; position:relative; float:left; width:250px; font-weight:normal;}
#nav li:hover ul.sub li a {
display:block;
height:18px;
width:250px;
line-height:18px;
text-indent:5px;
color:#fff;
text-decoration:none;
}
#nav li ul.sub li a.fly
{background-color:#0e71b8;}
#nav li:hover ul.sub li a:hover
{background-color:#0e71b8;}
#nav li:hover ul.sub li a.fly:hover
{background-color:#0e71b8;}
#nav li:hover li:hover ul,
#nav li:hover li:hover li:hover ul,
#nav li:hover li:hover li:hover li:hover ul,
#nav li:hover li:hover li:hover li:hover li:hover ul
{left:251px;
top:-3px;
background:transparent;
filter:progid:DXImageTransform.Microsoft.gradient(startColorStr=#00B1E8,endColorStr=#00B1E8);
-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr=#00B1E8,endColorstr=#00B1E8)";
zoom: 1;
background-color: rgba(54, 169, 225, 0.8); padding:3px; white-space:nowrap; width:250px; z-index:400; height:auto;}
#nav ul,
#nav li:hover ul ul,
#nav li:hover li:hover ul ul,
#nav li:hover li:hover li:hover ul ul,
#nav li:hover li:hover li:hover li:hover ul ul
{position:absolute; left:-9999px; top:-9999px; width:0; height:0; margin:0; padding:0; list-style:none;}
#nav li:hover li:hover a.fly,
#nav li:hover li:hover li:hover a.fly,
#nav li:hover li:hover li:hover li:hover a.fly,
#nav li:hover li:hover li:hover li:hover li:hover a.fly
{background-color:#0e71b8; color:#fff; border-color:#fff;}
#nav li:hover li:hover li a.fly,
#nav li:hover li:hover li:hover li a.fly,
#nav li:hover li:hover li:hover li:hover li a.fly
{background:#bbd37e url(arrow.gif) 80px 6px no-repeat; color:#000; border-color:#bbd37e;}
这是JS：
stuHover = function() {
var cssRule;
var newSelector;
for (var i = 0; i < document.styleSheets.length; i++)
for (var x = 0; x < document.styleSheets[i].rules.length ; x++)
{
cssRule = document.styleSheets[i].rules[x];
if (cssRule.selectorText.indexOf("LI:hover") != -1)
{
newSelector = cssRule.selectorText.replace(/LI:hover/gi, "LI.iehover");
document.styleSheets[i].addRule(newSelector , cssRule.style.cssText);
}
}
var getElm = document.getElementById("nav").getElementsByTagName("LI");
for (var i=0; i<getElm.length; i++) {
getElm[i].onmouseover=function() {
this.className+=" iehover";
}
getElm[i].onmouseout=function() {
this.className=this.className.replace(new RegExp(" iehover''b"), "");
}
}
}
if (window.attachEvent) window.attachEvent("onload", stuHover);
这是HTML:的顶部
<!-- header -->
<!-- SEO elements to be edited per page, enter your keywords between the "" -->
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
顶部的这些评论使IE使用Quirks模式。
确保<!DOCTYPE html ..是第一行，IE将使用标准模式，您的问题可能会得到解决。
在您的CSS中，在#nav li:hover ul.sub中，您需要删除：
filter:progid:DXImageTransform.Microsoft.gradient(startColorStr=#00B1E8,endColorStr=#00B1E8);
-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr=#00B1E8,endColorstr=#00B1E8)";
使用这些会导致overflow: hidden式的效果，这就是为什么您的子菜单看不到的原因。
Multilevel CSS Menu<br>
Demo <a href="www.mremind.com">Here</a><br>
<h2>Css For Menu</h2>
<p>
/**
* MAIN NAVIGATION
**/
#mainNav {`enter code here`
height:60px;
margin: 0 auto;
padding-left: 15px;
width:1000px;
vertical-align: middle;
}
#mainNav ul{
list-style-type:block;
list-style-image:none;
background:red;
margin: 0;
padding-right: 0px;
padding-left: 0px;
line-height: 100%;
-khtml-border: 1px solid #BFDBD7;
box-shadow: 0 1px 3px rgba(0, 0, 0, .4);
-webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, .4);
-moz-box-shadow: 0 1px 3px rgba(0,0,0, .4);
vertical-align: middle;
}
/************************************** Main Navigation boxes ******************************************************/
#mainNav ul li.navItems{
float:left;
display:inline-block;
width:94px;
height:60px;
border-left:solid 1px #D7D7D7;
}
#mainNav ul li.navItems:hover{
background:#034693;
}
#mainNav ul li.navItems:current{
}
#mainNav ul li.navItems > a{
width:94px;
height:60px;
font-family:Arial, Helvetica, sans-serif;
font-size:12px;
color:#4D4D4D;
display:block;
line-height:5.5em;
text-decoration:none;
text-align:center;
}
#mainNav ul li.navItems a:hover{
color:#FFF;
}
#mainNav ul li.navItems:hover a{
color:#FFF; /*keeps main nav text white upon rollover*/
}
#mainNav ul li.navItems:hover ul a{
color:#4D4D4D; /*stops sublinks from being white */
}
/* Dropdown List */
#mainNav ul li.navItems ul{
background:#FAFAFA;
border:1px solid #CCC;
list-style:none;
position:absolute;
display:none;
width:250px;
z-index:100;
}
#mainNav ul li.navItems ul li
{
padding: 10px 0;
font-size: 13px;
line-height: 1.5em !important;
border-bottom: 1px solid #CCC;
white-space: nowrap;
text-align: left;
}
#mainNav ul li.navItems ul li a{
font-size: 13px;
line-height: 1.5em !important;
text-align: left;
text-decoration: none;
padding-left:5px;
}
#mainNav ul li.navItems:hover ul li > a:hover{
background:#034693;
color:#FFF;
}
#mainNav ul li.navItems:hover ul li:hover{
background:#034693;
color:#FFF;
}
#mainNav ul li.navItems:hover ul li:hover > a{
background:#034693;
color:#FFF;
}
#mainNav ul li.navItems:hover ul.secondul{
display:block;
position:absolute;
}
/************************************** Sub Menu boxes ******************************************************/
#mainNav ul.secondul li.MarketingLI:hover ul
{
display:block;
position:absolute;
}
#mainNav ul.secondul li.MarketingLI ul{
width:200px;
padding:0;
font-size:13px;
line-height:1.5em !important;
border-bottom:1px solid #CCC;
white-space:nowrap;
text-align:left;
display:none;
top:0;
margin-left:100%;
}
</p><br>
<br>
<h2>HTML</h2><br>
<p>
<div id="mainNav">
<ul >
<li class="navItems"><a href=""></a> </li>
<li class="navItems" ><a class="first" href="#"></a>
<ul class="secondul">
<li class="MarketingLI"><a class="first" href=""></a>
<ul >
<li ><a href="">2nd Level 1</a>
</li>
<li ><a href="">2nd Level 1</a>
</li>
<li ><a href="">2nd Level 1</a>
</li>
</ul>
</li>
<li><a href=""></a>
</li>
<li><a href="#"></a></li>
</ul>
</li>
<li class="navItems"><a href=""></a>
</li>
<li class="navItems"><a href=""></a></li>
<li class="navItems"><a href=""></a> </li>
<li class="navItems"><a href=""></a> </li>
</ul>
<!--mainNav-->
</div>
</p>
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