CSS条件注释详解（根据不同浏览器加载CSS）

<!--[if XXX]>
这里是正常的html代码
<![endif]–>

<!–[if IE]> / 如果浏览器是IE /
<!–[if IE 5]> / 如果浏览器是IE 5 的版本 /
<!–[if IE 6]> / 如果浏览器是IE 6 的版本 /
<!–[if IE 7]> / 如果浏览器是IE 7 的版本 /

<!--[if gt IE 5.5]> / 如果IE版本大于5.5 /
<!–[if lte IE 6]> / 如果IE版本小于等于6 /
<!–[if !IE]> / 如果浏览器不是IE /

<!-- 默认先调用css.css样式表 -->
<link rel="stylesheet" type="text/css" xhref="css.css" />
<!--[if !IE]>
<!– 非IE下调用1.css样式表 –>
<link rel=”stylesheet” type=”text/css” xhref=”1.css” />
<![endif]–>
<!–[if lt IE 6]>
<!– 如果IE浏览器版本小于6,调用2.css样式表 –>
<link rel=”stylesheet” type=”text/css” xhref=”2.css” />
<![endif]–>

<div class="menu">
<ul>
<li><a class="drop" xhref="../menu/index.html">DEMOS
<!--[if IE 7]><!–>
</a>
<!–<![endif]–>
<!–IE7时显示</a>标签–>
<table><tr><td>
<ul>
<li><a xhref=”../menu/zero_dollars.html” title=”The zero dollar ads page”>zero dollars advertising page</a></li>
<li><a xhref=”../menu/embed.html” title=”Wrapping text around images”>wrapping text around images</a></li>
<li><a xhref=”../menu/form.html” title=”Styling forms”>styled form</a></li>
<li><a xhref=”../menu/nodots.html” title=”Removing active/focus borders”>active focus</a></li>
<li><a class=”drop” xhref=”../menu/hover_click.html” title=”Hover/click with no active/focus borders”>hover/click with no borders</li>
<li class=”upone”><a xhref=”../menu/shadow_boxing.html” title=”Multi-position drop shadow”>shadow boxing</a></li>
<li><a xhref=”../menu/old_master.html” title=”Image Map for detailed information”>image map for detailed information</a></li>
<li><a xhref=”../menu/bodies.html” title=”fun with background images”>fun with background images</a></li>
<li><a xhref=”../menu/fade_scroll.html” title=”fade-out scrolling”>fade scrolling</a></li>
<li><a xhref=”../menu/em_images.html” title=”em size images pared”>em image sizes pared</a></li>
</ul>
</td></tr></table>
<!–[if lte IE 6]>
</a>
<![endif]–>
</li>
<!–IE6时显示</a>标签–>
</ul>
</div>

<link rel="stylesheet" media="all" type="text/css" xhref="final_drop.css" />
<!--[if lte IE 6]>
<link rel=”stylesheet” media=”all” type=”text/css” xhref=”final_drop_ie.css” />
<![endif]–>

.menu ul li ul {
display: none;
}
/ specific to non IE browsers /
.menu ul li:hover a {
color:#fff;
background:#bd8d5e;
}
/定义鼠标滑过样式/
.menu ul li:hover ul {
display:block;
position:absolute;
:3em;
margin-:1px;
left:0;
width:150px;
}

.menu ul li a:hover {
color:#fff;
background:#bd8d5e;
}
/当鼠标滑过时li包含的ul显示/
.menu ul li a:hover ul {
display:block;
position:absolute;
:3em;
left:0;
background:#fff;
margin-:0;
marg\in-:1px;
}

<!--[if lte IE 6]>
</a>
<![endif]–>