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<div id="menu">
<ul>
<li><a title="网站标准" href="http://www.w3cn.org/webstandards.html">什么是网站标准</a></li>
<li><a title="标准的好处" href="http://www.w3cn.org/benefits.html">使用标准的好处</a></li>
<li><a title="怎样过渡" href="http://www.w3cn.org/howto.html">怎样过渡</a></li>
<li><a title="相关教程" href="http://www.w3cn.org/tutorial.html">相关教程</a></li>
<li><a title="工具" href="http://www.w3cn.org/tools.html">工具</a></li>
<li><a title="资源及链接" href="http://www.w3cn.org/resources.html">资源及链接</a></li>
</ul>
</div>

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#menu {
MARGIN: 15px 20px 0px 15px;  /*定义层的外边框距离*/
PADDING:15px;    /*定义层的内边框为15px*/
BACKGROUND: #dfdfdf;   /*定义背景颜色*/
COLOR: #666;    /*定义字体颜色*/
BORDER:#fff 2px solid;  /*定义边框为2px白色线条*/
WIDTH:160px;    /*定义内容的宽度为160px*/
}

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#menu ul {
MARGIN: 0px;
PADDING: 0px;
BORDER: medium none; /*不显示边框*/
LINE-HEIGHT: normal;
LIST-STYLE-TYPE: none;

}
#menu li {BORDER-TOP: #FFF 1px solid; MARGIN: 0px;}

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#menu li a {
PADDING:5px 0px 5px 15px;
DISPLAY: block;
FONT-WEIGHT: bold;
BACKGROUND: url(images/icon_dot_lmenu.gif) transparent no-repeat 2px 8px;
WIDTH: 100%;
COLOR: #444;
TEXT-DECORATION: none;
}
#menu li a:hover { BACKGROUND: url(images/icon_dot_lmenu2.gif) #C61C18 no-repeat 2px 8px;
COLOR: #fff; }

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<div id="submenu">
<ul>
<li id="one"><a title="首页" href="http://www.w3cn.org/">Home</a></li>
<li id="two"><a title="关于我们" href="http://www.w3cn.org/aboutus.html">关于我们</a></li>
<li id="three"><a title="网站标准" href="http://www.w3cn.org/webstandards.html">网站标准</a></li>
<li id="four"><a title="标准的好处" href="http://www.w3cn.org/benefits.html">标准的好处</a></li>
<li id="five"><a title="怎样过渡" href="http://www.w3cn.org/howto.html">怎样过渡</a></li>
<li id="six"><a title="相关教程" href="http://www.w3cn.org/tutorial.html">相关教程</a></li>
<li id="seven"><a title="工具" href="http://www.w3cn.org/tools.html">工具</a></li>
<li id="eight"><a title="资源及链接" href="http://www.w3cn.org/resources.html">资源及链接</a></li>
<li id="nine"><a title="常见问题" href="http://www.w3cn.org/faq.html">常见问题</a></li>
</ul>
</div>

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#submenu {
MARGIN: 0px 8px 0px 8px;
PADDING: 4px 0px 0px 0px;
BORDER: #fff 1px solid;
BACKGROUND: #dfdfdf;
COLOR: #666;
HEIGHT:25px; }

#submenu ul {
CLEAR: left;
MARGIN: 0px;
PADDING:0px;
BORDER: 0px;
LIST-STYLE-TYPE: none;
TEXT-ALIGN: center;
DISPLAY:inline;
}

#submenu li {
FLOAT: left;
DISPLAY: block;
MARGIN: 0px;
PADDING: 0px;
TEXT-ALIGN: center}

#submenu li a {
DISPLAY: block;
PADDING:2px 3px 2px 3px;
BACKGROUND: url(images/icon_dot_lmenu.gif) transparent no-repeat 2px 8px;
FONT-WEIGHT: bold;
WIDTH: 100%;
COLOR: #444;
TEXT-DECORATION: none;
}

#submenu li a:hover {
BACKGROUND: url(images/icon_dot_lmenu2.gif) #C61C18 no-repeat 2px 8px;
COLOR: #fff; }

#submenu ul li#one A { WIDTH: 60px}
#submenu ul li#two A { WIDTH: 80px}
#submenu ul li#three A { WIDTH: 80px}
#submenu ul li#four A { WIDTH: 90px}
#submenu ul li#five A { WIDTH: 80px}
#submenu ul li#six A { WIDTH: 80px}
#submenu ul li#seven A { WIDTH: 60px}
#submenu ul li#eight A { WIDTH: 90px}
#submenu ul li#nine A { WIDTH: 80px}