我试图寻找几个小时来解决这个问题，但没有任何效果。我正在尝试构建一个菜单栏，但它在 IE 中无法正常工作（我在 IE7 和 8 中进行了测试。）一切都以怪癖模式打开 IE。我已经查看了造成这种情况的原因，并尝试了我现在无法理解的一切。我通过验证运行了 CSS 和 HTML 文件，并且都以零问题返回。我听说了文档类型之前隐藏的 BOM 字符和空白，并通过检测器运行了这两个文件，两者都恢复正常。我很抱歉，但我不像这里的一些人那么先进，并提前感谢您的帮助。任何关于可能导致这种情况的教育将不胜感激。我无法发布 URL，因为这是一个 Intranet 站点，所以我只会发布我正在使用的代码。
HTML
<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" href="menu.css" type="text/css" media="screen" />
<title>Mega Drop Down Menu</title>
<!--[if IE 6]>
<style>
body {behavior: url("csshover3.htc");}
#menu li .drop {background:url("img/drop.gif") no-repeat right 8px;
</style>
<![endif]-->
</head>
<body>
<ul id="menu">
<li><a href="#" class="drop">Home</a>
<div class="dropdown_2columns">
<div class="col_2">
<h2>Welcome !</h2>
</div>
<div class="col_2">
<p>Hi and welcome here ! This is a showcase of the possibilities of this awesome Mega Drop Down Menu.</p>
<p>This item comes with a large range of prepared typographic stylings such as headings, lists, etc.</p>
</div>
<div class="col_2">
<h2>Cross Browser Support</h2>
</div>
<div class="col_1">
<img src="img/browsers.png" width="125" height="48" alt="" />
</div>
<div class="col_1">
<p>This mega menu has been tested in all major browsers.</p>
</div>
</div>
</li>
<li><a href="#" class="drop">5 Columns</a>
<div class="dropdown_5columns">
<div class="col_5">
<h2>This is an example of a large container with 5 columns</h2>
</div>
<div class="col_1">
<p class="black_box">This is a dark grey box text. Fusce in metus at enim porta lacinia vitae a arcu. Sed sed lacus nulla mollis porta quis.</p>
</div>
<div class="col_1">
<p>Phasellus vitae sapien ac leo mollis porta quis sit amet nisi. Mauris hendrerit, metus cursus accumsan tincidunt.</p>
</div>
<div class="col_1">
<p class="italic">This is a sample of an italic text. Consequat scelerisque. Fusce sed lectus at arcu mollis accumsan at nec nisi porta quis sit amet.</p>
</div>
<div class="col_1">
<p>Curabitur euismod gravida ante nec commodo. Nunc dolor nulla, semper in ultricies vitae, vulputate porttitor neque.</p>
</div>
<div class="col_1">
<p class="strong">This is a sample of a bold text. Aliquam sodales nisi nec felis hendrerit ac eleifend lectus feugiat scelerisque.</p>
</div>
<div class="col_5">
<h2>Here is some content with side images</h2>
</div>
<div class="col_3">
<img src="img/01.jpg" width="70" height="70" class="img_left imgshadow" alt="" />
<p>Maecenas eget eros lorem, nec pellentesque lacus. Aenean dui orci, rhoncus sit amet tristique eu, tristique sed odio. Praesent ut interdum elit. Sed in sem mauris. Aenean a commodo mi. Praesent augue lacus.<a href="#">Read more...</a></p>
<img src="img/02.jpg" width="70" height="70" class="img_left imgshadow" alt="" />
<p>Aliquam elementum felis quis felis consequat scelerisque. Fusce sed lectus at arcu mollis accumsan at nec nisi. Aliquam pretium mollis fringilla. Nunc in leo urna, eget varius metus. Aliquam sodales nisi.<a href="#">Read more...</a></p>
</div>
<div class="col_2">
<p class="black_box">This is a black box, you can use it to highligh some content. Sed sed lacus nulla, et lacinia risus. Phasellus vitae sapien ac leo mollis porta quis sit amet nisi. Mauris hendrerit, metus cursus accumsan tincidunt.Quisque vestibulum nisi non nunc blandit placerat. Mauris facilisis, risus ut lobortis posuere, diam lacus congue lorem, ut condimentum ligula est vel orci. Donec interdum lacus at velit varius gravida. Nulla ipsum risus.</p>
</div>
</div>
</li>
<li><a href="#" class="drop">4 Columns</a>
<div class="dropdown_4columns">
<div class="col_4">
<h2>This is a heading title</h2>
</div>
<div class="col_1">
<h3>Some Links</h3>
<ul>
<li><a href="#">ThemeForest</a></li>
<li><a href="#">GraphicRiver</a></li>
<li><a href="#">ActiveDen</a></li>
<li><a href="#">VideoHive</a></li>
<li><a href="#">3DOcean</a></li>
</ul>
</div>
<div class="col_1">
<h3>Useful Links</h3>
<ul>
<li><a href="#">NetTuts</a></li>
<li><a href="#">VectorTuts</a></li>
<li><a href="#">PsdTuts</a></li>
<li><a href="#">PhotoTuts</a></li>
<li><a href="#">ActiveTuts</a></li>
</ul>
</div>
<div class="col_1">
<h3>Other Stuff</h3>
<ul>
<li><a href="#">FreelanceSwitch</a></li>
<li><a href="#">Creattica</a></li>
<li><a href="#">WorkAwesome</a></li>
<li><a href="#">Mac Apps</a></li>
<li><a href="#">Web Apps</a></li>
</ul>
</div>
<div class="col_1">
<h3>Misc</h3>
<ul>
<li><a href="#">Design</a></li>
<li><a href="#">Logo</a></li>
<li><a href="#">Flash</a></li>
<li><a href="#">Illustration</a></li>
<li><a href="#">More...</a></li>
</ul>
</div>
</div>
</li>
<li class="menu_right"><a href="#" class="drop">1 Column</a>
<div class="dropdown_1column align_right">
<div class="col_1">
<ul class="simple">
<li><a href="#">FreelanceSwitch</a></li>
<li><a href="#">Creattica</a></li>
<li><a href="#">WorkAwesome</a></li>
<li><a href="#">Mac Apps</a></li>
<li><a href="#">Web Apps</a></li>
<li><a href="#">NetTuts</a></li>
<li><a href="#">VectorTuts</a></li>
<li><a href="#">PsdTuts</a></li>
<li><a href="#">PhotoTuts</a></li>
<li><a href="#">ActiveTuts</a></li>
<li><a href="#">Design</a></li>
<li><a href="#">Logo</a></li>
<li><a href="#">Flash</a></li>
<li><a href="#">Illustration</a></li>
<li><a href="#">More...</a></li>
</ul>
</div>
</div>
</li>
<li class="menu_right"><a href="#" class="drop">3 columns</a>
<div class="dropdown_3columns align_right">
<div class="col_3">
<h2>Lists in Boxes</h2>
</div>
<div class="col_1">
<ul class="greybox">
<li><a href="#">FreelanceSwitch</a></li>
<li><a href="#">Creattica</a></li>
<li><a href="#">WorkAwesome</a></li>
<li><a href="#">Mac Apps</a></li>
<li><a href="#">Web Apps</a></li>
</ul>
</div>
<div class="col_1">
<ul class="greybox">
<li><a href="#">ThemeForest</a></li>
<li><a href="#">GraphicRiver</a></li>
<li><a href="#">ActiveDen</a></li>
<li><a href="#">VideoHive</a></li>
<li><a href="#">3DOcean</a></li>
</ul>
</div>
<div class="col_1">
<ul class="greybox">
<li><a href="#">Design</a></li>
<li><a href="#">Logo</a></li>
<li><a href="#">Flash</a></li>
<li><a href="#">Illustration</a></li>
<li><a href="#">More...</a></li>
</ul>
</div>
<div class="col_3">
<h2>Here are some image examples</h2>
</div>
<div class="col_3">
<img src="img/02.jpg" width="70" height="70" class="img_left imgshadow" alt="" />
<p>Maecenas eget eros lorem, nec pellentesque lacus. Aenean dui orci, rhoncus sit amet tristique eu, tristique sed odio. Praesent ut interdum elit. Maecenas imperdiet, nibh vitae rutrum vulputate, lorem sem condimentum.<a href="#">Read more...</a></p>
<img src="img/01.jpg" width="70" height="70" class="img_left imgshadow" alt="" />
<p>Aliquam elementum felis quis felis consequat scelerisque. Fusce sed lectus at arcu mollis accumsan at nec nisi. Aliquam pretium mollis fringilla. Vestibulum tempor facilisis malesuada. <a href="#">Read more...</a></p>
</div>
</div>
</li>
</ul>
</body>
</html>
这里的 CSS
body, ul, li {
font-size:14px;
font-family:Arial, Helvetica, sans-serif;
line-height:21px;
text-align:left;
}
#menu {
list-style:none;
width:940px;
margin:30px auto 0px auto;
height:43px;
padding:0px 20px 0px 20px;
/* Rounded Corners */
-moz-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
/* Background color and gradients */
background: #014464;
background: -moz-linear-gradient(top, #0272a7, #013953);
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#0272a7), to(#013953));
/* Borders */
border: 1px solid #002232;
-moz-box-shadow:inset 0px 0px 1px #edf9ff;
-webkit-box-shadow:inset 0px 0px 1px #edf9ff;
box-shadow:inset 0px 0px 1px #edf9ff;
}
#menu li {
float:left;
display:block;
text-align:center;
position:relative;
padding: 4px 10px 4px 10px;
margin-right:30px;
margin-top:7px;
border:none;
}
#menu li:hover {
border: 1px solid #777777;
padding: 4px 9px 4px 9px;
/* Background color and gradients */
background: #F4F4F4;
background: -moz-linear-gradient(top, #F4F4F4, #EEEEEE);
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#F4F4F4), to(#EEEEEE));
/* Rounded corners */
-moz-border-radius: 5px 5px 0px 0px;
-webkit-border-radius: 5px 5px 0px 0px;
border-radius: 5px 5px 0px 0px;
}
#menu li a {
font-family:Arial, Helvetica, sans-serif;
font-size:14px;
color: #EEEEEE;
display:block;
outline:0;
text-decoration:none;
text-shadow: 1px 1px 1px #000;
}
#menu li:hover a {
color:#161616;
text-shadow: 1px 1px 1px #ffffff;
}
#menu li .drop {
padding-right:21px;
background:url("img/drop.png") no-repeat right 8px;
}
#menu li:hover .drop {
background:url("img/drop.png") no-repeat right 7px;
}
.dropdown_1column,
.dropdown_2columns,
.dropdown_3columns,
.dropdown_4columns,
.dropdown_5columns {
margin:4px auto;
float:left;
position:absolute;
left:-999em; /* Hides the drop down */
text-align:left;
padding:10px 5px 10px 5px;
border:1px solid #777777;
border-top:none;
/* Gradient background */
background:#F4F4F4;
background: -moz-linear-gradient(top, #EEEEEE, #BBBBBB);
background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#EEEEEE), to(#BBBBBB));
/* Rounded Corners */
-moz-border-radius: 0px 5px 5px 5px;
-webkit-border-radius: 0px 5px 5px 5px;
border-radius: 0px 5px 5px 5px;
}
.dropdown_1column {width: 140px;}
.dropdown_2columns {width: 280px;}
.dropdown_3columns {width: 420px;}
.dropdown_4columns {width: 560px;}
.dropdown_5columns {width: 700px;}
#menu li:hover .dropdown_1column,
#menu li:hover .dropdown_2columns,
#menu li:hover .dropdown_3columns,
#menu li:hover .dropdown_4columns,
#menu li:hover .dropdown_5columns {
left:-1px;
top:auto;
}
.col_1,
.col_2,
.col_3,
.col_4,
.col_5 {
display:inline;
float: left;
position: relative;
margin-left: 5px;
margin-right: 5px;
}
.col_1 {width:130px;}
.col_2 {width:270px;}
.col_3 {width:410px;}
.col_4 {width:550px;}
.col_5 {width:690px;}
#menu .menu_right {
float:right;
margin-right:0px;
}
#menu li .align_right {
/* Rounded Corners */
-moz-border-radius: 5px 0px 5px 5px;
-webkit-border-radius: 5px 0px 5px 5px;
border-radius: 5px 0px 5px 5px;
}
#menu li:hover .align_right {
left:auto;
right:-1px;
top:auto;
}
#menu p, #menu h2, #menu h3, #menu ul li {
font-family:Arial, Helvetica, sans-serif;
line-height:21px;
font-size:12px;
text-align:left;
text-shadow: 1px 1px 1px #FFFFFF;
}
#menu h2 {
font-size:21px;
font-weight:400;
letter-spacing:-1px;
margin:7px 0 14px 0;
padding-bottom:14px;
border-bottom:1px solid #666666;
}
#menu h3 {
font-size:14px;
margin:7px 0 14px 0;
padding-bottom:7px;
border-bottom:1px solid #888888;
}
#menu p {
line-height:18px;
margin:0 0 10px 0;
}
#menu li:hover div a {
font-size:12px;
color:#015b86;
}
#menu li:hover div a:hover {
color:#029feb;
}
.strong {
font-weight:bold;
}
.italic {
font-style:italic;
}
.imgshadow { /* Better style on light background */
background:#FFFFFF;
padding:4px;
border:1px solid #777777;
margin-top:5px;
-moz-box-shadow:0px 0px 5px #666666;
-webkit-box-shadow:0px 0px 5px #666666;
box-shadow:0px 0px 5px #666666;
}
.img_left { /* Image sticks to the left */
width:auto;
float:left;
margin:5px 15px 5px 5px;
}
#menu li .black_box {
background-color:#333333;
color: #eeeeee;
text-shadow: 1px 1px 1px #000;
padding:4px 6px 4px 6px;
/* Rounded Corners */
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
border-radius: 5px;
/* Shadow */
-webkit-box-shadow:inset 0 0 3px #000000;
-moz-box-shadow:inset 0 0 3px #000000;
box-shadow:inset 0 0 3px #000000;
}
#menu li ul {
list-style:none;
padding:0;
margin:0 0 12px 0;
}
#menu li ul li {
font-size:12px;
line-height:24px;
position:relative;
text-shadow: 1px 1px 1px #ffffff;
padding:0;
margin:0;
float:none;
text-align:left;
width:130px;
}
#menu li ul li:hover {
background:none;
border:none;
padding:0;
margin:0;
}
#menu li .greybox li {
background:#F4F4F4;
border:1px solid #bbbbbb;
margin:0px 0px 4px 0px;
padding:4px 6px 4px 6px;
width:116px;
/* Rounded Corners */
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
-khtml-border-radius: 5px;
border-radius: 5px;
}
#menu li .greybox li:hover {
background:#ffffff;
border:1px solid #aaaaaa;
padding:4px 6px 4px 6px;
margin:0px 0px 4px 0px;
}