css div 下拉菜单

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原样式:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>52css.com</title>
<style type="text/css">
.menu {
font-family: verdana, sans-serif;
width:750px;
position:relative;
font-size:0.85em;
padding-bottom:250px;
}
.menu ul {
padding:0;
margin:0;
list-style-type: none;
}
.menu ul li {
float:left;
position:relative;
}
.menu ul li a, .menu ul li a:visited {
display:block;
text-decoration:none;
color:#000;
width:139px;
height:3em;
color:#000;
border:1px solid #fff;
border-width:1px 1px 0 0;
background:#dfc184;
padding-left:10px;
line-height:3em;
}
* html .menu ul li a, .menu ul li a:visited {
width:149px;
w/idth:139px;
}
.menu ul li ul {
display: none;
}
table {
margin:-1px;
border-collapse:collapse;
font-size:1em;
}

/* specific to non IE browsers */
.menu ul li:hover a {
color:#fff;
background:#bd8d5e;
}
.menu ul li:hover ul {
display:block;
position:absolute;
top:3em;
margin-top:1px;
left:0;
width:150px;
}
.menu ul li:hover ul li ul {
display: none;
}
.menu ul li:hover ul li a {
display:block;
background:#faeec7;
color:#000;
height:auto;
line-height:1.2em;
padding:5px 10px;
width:129px
}
.menu ul li:hover ul li a.drop {
background:#c9c9a7;
}
.menu ul li:hover ul li a:hover {
background:#c9c9a7;
color:#000;
}
.menu ul li:hover ul li:hover ul {
display:block;
position:absolute;
left:150px;
top:0;
width:150px;
}
.menu ul li:hover ul li:hover ul.left {
left:-150px;
}

</style>
<!--[if lte IE 6]>
<style type="text/css">
.menu ul li a:hover {
color:#fff;
background:#bd8d5e;
}
.menu ul li a:hover ul {
display:block;
position:absolute;
top:3em;
left:0;
background:#fff;
margin-top:0;
marg/in-top:1px;
}
.menu ul li a:hover ul li a {
display:block;
background:#dbe4ab;
color:#000;
height:auto;
line-height:1.5em;
padding:5px 10px;
width:150px;
w/idth:129px;
}
.menu ul li a:hover ul li a.drop {
background:#c9c9a7;
}
.menu ul li a:hover ul li a ul {
visibility:hidden;
position:absolute;
height:0;
width:0;
}
.menu ul li a:hover ul li a:hover {
background:#c9c9a7; color:#000;
}
.menu ul li a:hover ul li a:hover ul {
visibility:visible;
position:absolute;
top:0;
color:#000;
left:150px;
}
.menu ul li a:hover ul li a:hover ul.left {
left:-150px;
}

</style>
<![endif]-->
</head>
<body>
<div class="menu">

<ul>
<li><a class="drop" href="http://www.52css.com/">DEMOS
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->

<table><tr><td>

    <ul>
    <li><a href="http://www.52css.com/" title="The zero dollar ads page">zero dollars advertising page</a></li>
    <li><a href="http://www.52css.com/" title="Wrapping text around images">wrapping text around images</a></li>
    <li><a href="http://www.52css.com/" title="Styling forms">styled form</a></li>
    <li><a href="http://www.52css.com/" title="Removing active/focus borders">active focus</a></li>
    <li><a class="drop" href="http://www.52css.com/" title="Hover/click with no active/focus borders">hover/click with no borders
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->


<table><tr><td>
        <ul>
            <li><a href="http://www.52css.com/" title="Styling forms">styled form</a></li>
            <li><a href="http://www.52css.com/" title="Removing active/focus borders">removing active/focus borders</a></li>
            <li><a href="http://www.52css.com/" title="Hover/click with no active/focus borders">hover/click</a></li>
        </ul>
</td></tr></table>

<!--[if lte IE 6]>
</a>
<![endif]-->

    </li>

    <li class="upone"><a href="http://www.52css.com/" title="Multi-position drop shadow">shadow boxing</a></li>
    <li><a href="http://www.52css.com/" title="Image Map for detailed information">image map for detailed information</a></li>
    <li><a href="http://www.52css.com/" title="fun with background images">fun with background images</a></li>
    <li><a href="http://www.52css.com/" title="fade-out scrolling">fade scrolling</a></li>
    <li><a href="http://www.52css.com/" title="em size images compared">em image sizes compared</a></li>
    </ul>

</td></tr></table>

<!--[if lte IE 6]>
</a>
<![endif]-->

</li>


<li><a href="http://www.52css.com/">BOXES
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->


<table><tr><td>

    <ul>
    <li><a href="http://www.52css.com/" title="a coded list of spies">a coded list of spies</a></li>
    <li><a href="http://www.52css.com/" title="a horizontal vertical menu">vertical menu</a></li>
    <li><a href="http://www.52css.com/" title="an enlarging unordered list">enlarging unordered list</a></li>
    <li><a href="http://www.52css.com/" title="an unordered list with link images">link images</a></li>
    <li><a href="http://www.52css.com/" title="non-rectangular links">non-rectangular</a></li>
    <li><a href="http://www.52css.com/" title="jigsaw links">jigsaw links</a></li>
    <li><a href="http://www.52css.com/" title="circular links">circular links</a></li>
    </ul>

</td></tr></table>

<!--[if lte IE 6]>
</a>
<![endif]-->

</li>

<li><a href="http://www.52css.com/">MOZILLA
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->


<table><tr><td>

    <ul>
    <li><a href="http://www.52css.com/" title="A drop down menu">drop down menu</a></li>
    <li><a href="http://www.52css.com/" title="A cascading menu">cascading menu</a></li>
    <li><a href="http://www.52css.com/" title="Using content:">content:</a></li>
    <li><a href="http://www.52css.com/" title=":hover applied to a div">mozzie box</a></li>
    <li><a href="http://www.52css.com/" title="I can build a rainbow">I can build a rainbow with transparent borders</a></li>
    <li><a href="http://www.52css.com/" title="Snooker cue">a snooker cue using border art</a></li>
    <li><a href="http://www.52css.com/" title="Target Practise">target practise</a></li>
    <li><a href="http://www.52css.com/" title="Two tone headings">two tone headings</a></li>
    <li><a href="http://www.52css.com/" title="Shadow text">shadow text</a></li>
    </ul>

</td></tr></table>

<!--[if lte IE 6]>
</a>
<![endif]-->

</li>

<li><a href="http://www.52css.com/">EXPLORER
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->


<table><tr><td>

    <ul>
    <li><a href="http://www.52css.com/" title="Example one">the first example for Internet Explorer</a></li>
    <li><a href="http://www.52css.com/" title="Weft fonts">weft fonts</a></li>
    <li><a href="http://www.52css.com/" title="Vertical align">vertically aligning text</a></li>
    </ul>

</td></tr></table>

<!--[if lte IE 6]>
</a>
<![endif]-->

</li>

<li><a href="http://www.52css.com/">OPACITY
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->


<table><tr><td>

    <ul>
    <li><a href="http://www.52css.com/" title="colour wheel">a colour wheel using opaque colours</a></li>
    <li><a href="http://www.52css.com/" title="a menu using opacity">a menu using opacity</a></li>
    <li><a href="http://www.52css.com/" title="partial opacity">partial opacity</a></li>
    <li><a href="http://www.52css.com/" title="partial opacity II">partial opacity II</a></li>

    <li><a class="drop" href="http://www.52css.com/" title="Hover/click with no active/focus borders">HOVER/CLICK
<!--[if IE 7]><!-->
</a>
<!--<![endif]-->

<table><tr><td>

        <ul class="left">
            <li><a href="http://www.52css.com/" title="Styling forms">styled form</a></li>
            <li><a href="http://www.52css.com/" title="Removing active/focus borders">removing active/focus borders</a></li>
            <li><a href="http://www.52css.com/" title="Hover/click with no active/focus borders">hover/click</a></li>
        </ul>

</td></tr></table>

<!--[if lte IE 6]>
</a>
<![endif]-->

    </li>
    </ul>

</td></tr></table>

<!--[if lte IE 6]>
</a>
<![endif]-->

</li>
</ul>

</div>
</body>
</html>
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自己改的下拉样式

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Defaultkkkjj.aspx.cs" Inherits="Defaultkkkjj" %>

 

<!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 runat="server">
    <title>无标题页</title>
    <style type="text/css">
 body
        {
         margin:0 auto;
         width:950px;
         }
.menu {

background-color: Green;
/*font-family:verdana,sans-serif;
font-size:0.85em;*/
height:29px;
position:relative;
width:950px;
}
.menu ul {
padding:0;
margin:0;
list-style-type: none;
}
.menu ul li
{
float:left;
position:relative;
top: 0px;
left: 0px;
           
margin-left:0px;
}
.menu ul li a, .menu ul li a:visited {
display:block;
text-decoration:none;
color:#FFFFFF;

height:29px;
line-height:29px;

/*height:3em;
line-height:3em;*/

font-weight:bolder;
border:1px solid #fff;
border-width:1px 1px 0 0;
/*background-color:#dfc184;*/


text-align:center;

width:104px;
}
* html .menu ul li a, .menu ul li a:visited
{
width:149px;
w/idth:104px;
}
.menu ul li ul {
display: none;
}
table {
margin:-1px;
border-collapse:collapse;
font-size:1em;
}

/* specific to non IE browsers */
.menu ul li:hover a {
color:#fff;
background:#093;
}
.menu ul li:hover ul {
display:block;
position:absolute;
/*top:3em;*/
top:29px;
margin-top:1px;
left:0;
width:150px;
}
.menu ul li:hover ul li ul {
display: none;
}
.menu ul li:hover ul li a {
display:block;
/*background:#faeec7;*/
background:#6c6;
font-weight:normal;
color:#fff;
height:auto;
line-height:1.2em;
padding:5px 0px;
width:104px;

}
.menu ul li:hover ul li a.drop {
background:#c9c9a7;
}
.menu ul li:hover ul li a:hover {
background:#090;
color:#000;
}
.menu ul li:hover ul li:hover ul {
display:block;
position:absolute;
left:150px;
top:0;
width:150px;
}
.menu ul li:hover ul li:hover ul.left {
left:-150px;

}
</style>

<!--[if lte IE 6]>
<style type="text/css">
.menu ul li a:hover {
color:#fff;
background:#093;
text-decoration:none;
}
.menu ul li a:hover ul {
display:block;
position:absolute;
top:29px;
left:0;
background:#fff;
margin-top:0;
marg/in-top:1px;
}
.menu ul li a:hover ul li a {
display:block;
background:#6c6;
color:#fff;
font-weight:normal;
height:auto;
line-height:1.2em;
padding:5px 0px;
width:104px;
w/idth:104px;
}
.menu ul li a:hover ul li a.drop {
background:#c9c9a7;
}
.menu ul li a:hover ul li a ul {
visibility:hidden;
position:absolute;
height:0;
width:0;
}
.menu ul li a:hover ul li a:hover {
background:#090; color:#000;
text-decoration:none;

}
.menu ul li a:hover ul li a:hover ul {
visibility:visible;
position:absolute;
top:0;
color:#000;
left:150px;
}
.menu ul li a:hover ul li a:hover ul.left {
left:-150px;
}

</style>
<![endif]-->
</head>
<body>
    <form id="form1" runat="server">
    <div id="header">            
               
        <div class="menu">
        <ul>
            <li>
            <a class="drop" href="index.aspx">首页
                <!--[if IE 7]><!-->
            </a>
                <!--<![endif]-->
             
                <!--[if lte IE 6]>
</a>
<![endif]-->
            </li>
            <li><a href="javascript:void(0)">新闻动态
                <!--[if IE 7]><!-->
            </a>
                <!--<![endif]-->
                <table>
                    <tr>
                        <td>
                            <ul>
                                <li><a href="#">职业病</a></li>
                                <li><a href="#">用药常识</a></li>
                                <li><a href="#">妇幼保健</a></li>
                                <li><a href="#">中医中药</a></li>
                              
                            </ul>
                        </td>
                    </tr>
                </table>
                <!--[if lte IE 6]>
</a>
<![endif]-->
            </li>
            <li><a href="javascript:void(0)">组织机构
                <!--[if IE 7]><!-->
            </a>
                <!--<![endif]-->
                <table>
                    <tr>
                        <td>
                            <ul>
                                <li><a href="leader.aspx" target="_blank">领导介绍</a></li>
                                <li><a href="department.aspx" target="_blank">机构职能</a></li>
                                <li><a href="directpart.aspx" target="_blank">直属单位</a></li>
                              
                            </ul>
                        </td>
                    </tr>
                </table>
                <!--[if lte IE 6]>
</a>
<![endif]-->
            </li>
            <li><a href="#">通知公告
                <!--[if IE 7]><!-->
              </a>
                <!--<![endif]-->
               
                <!--[if lte IE 6]>
</a>
<![endif]-->
            </li>
           
            <li><a href="#">公文信息
                <!--[if IE 7]><!-->
                </a>
                <!--<![endif]-->
               
                <!--[if lte IE 6]>
</a>
<![endif]-->
            </li>
           
           
            <li><a href="#">工作动态
                <!--[if IE 7]><!-->
            </a>
                <!--<![endif]-->
               
                <!--[if lte IE 6]>
</a>
<![endif]-->
            </li>
           
           
           
           
            <li> <a href="javascript:void(0)">办事指南
                <!--[if IE 7]><!-->
            </a>
                <!--<![endif]-->
                <table>
                    <tr>
                        <td>
                            <ul>
                                <li><a href="department_two.aspx" target="_blank">局机关办事</a></li>
                                <li><a href="jigou.aspx" target="_blank">医疗机构名单</a></li>
                                <li><a href="medicalexpert.aspx" target="blank">医疗专家名单</a></li>
                                <li><a href="baojian.aspx" target="blank">妇幼保健机构</a></li>
                               
                            </ul>
                        </td>
                    </tr>
                </table>
                <!--[if lte IE 6]>
</a>
<![endif]-->
            </li>
           
           
           
            <li><a href="javascript:void(0)">保健知识
                <!--[if IE 7]><!-->
            </a>
                <!--<![endif]-->
                <table>
                    <tr>
                        <td>
                            <ul>
                                <li><a href="#">职业病</a></li>
                                <li><a href="#">用药常识</a></li>
                                <li><a href="#">妇幼保健</a></li>
                                <li><a href="#">中医中药</a></li>
                               
                            </ul>
                        </td>
                    </tr>
                </table>
                <!--[if lte IE 6]>
</a>
<![endif]-->
            </li>
           
           
           
           
           
           
           
           
            <li><a href="#" style="width:109px;" target="_blank">网站地图</a>
              
            </li>
           
           
           
        </ul>
    </div>
       
    </div>
  
    </form>
</body>
</html>