代码： <div class="main_2">
<div class="m_left">
<ul class="nav">
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu1')">税务登记</a>
<ul id="ChildMenu1" class="expanded">
<li id="border_top"><a href="biangengdengji.html">变更登记</a></li>
<li><a href="shelidengji.html">设立登记</a></li>
<li><a href="#">复业登记</a></li>
<li><a href="#">扣缴义务人登记</a></li>
<li><a href="#">停业登记</a></li>
<li><a href="#">外埠经营登记</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu2')">认定管理</a>
<ul id="ChildMenu2" class="collapsed">
<li id="border_top"><a href="#">税务资格认证</a></li>
<li><a href="#">税务资格认证</a></li>
<li><a href="#">税务资格认证</a></li>
<li><a href="#">税务资格认证</a></li>
<li><a href="#">税务资格认证</a></li>
<li><a href="#">税务资格认证</a></li>
<li><a href="#">税务资格认证</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu3')">防伪税控</a>
<ul id="ChildMenu3" class="collapsed">
<li id="border_top"><a href="fangzhishuishou.html">防伪税控</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu6')">发票管理</a>
<ul id="ChildMenu6" class="collapsed">
<li id="border_top"><a href="#">发票拆本使用审批</a></li>
<li><a href="#">发票拆本使用审批（行政许可）</a></li>
<li><a href="#">发票拆本使用审批</a></li>
<li><a href="#">发票拆本使用审批</a></li>
<li><a href="#">发票拆本使用审批</a></li>
<li><a href="#">发票拆本使用审批</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu4')">账簿管理</a>
<ul id="ChildMenu4" class="collapsed">
<li id="border_top"><a href="#">记账核算</a></li>
<li><a href="#">记账核算</a></li>
<li><a href="#">记账核算</a></li>
<li><a href="#">记账核算</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu5')">纳税申报</a>
<ul id="ChildMenu5" class="collapsed">
<li id="border_top"><a href="#">出口货物退税申报</a></li>
<li><a href="#">出口货物退税申报</a></li>
<li><a href="#">出口货物退税申报</a></li>
<li><a href="#">出口货物退税申报</a></li>
<li><a href="#">出口货物退税申报</a></li>
<li><a href="#">出口货物退税申报</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu7')">税款缴纳</a>
<ul id="ChildMenu7" class="collapsed">
<li id="border_top"><a href="#">延期缴纳税款</a></li>
<li><a href="#">延期缴纳税款</a></li>
<li><a href="#">延期缴纳税款</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu8')">证明管理</a>
<ul id="ChildMenu8" class="collapsed">
<li id="border_top"><a href="#">补办出口货物报关单证明</a></li>
<li><a href="#">补办出口货物报关单证明</a></li>
<li><a href="#">补办出口货物报关单证明</a></li>
<li><a href="#">补办出口货物报关单证明</a></li>
<li><a href="#">补办出口货物报关单证明</a></li>
<li><a href="#">补办出口货物报关单证明</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu9')">特殊税种</a>
<ul id="ChildMenu9" class="collapsed">
<li id="border_top"><a href="#">车辆购置税</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu10')">纳税检查</a>
<ul id="ChildMenu10" class="collapsed">
<li id="border_top"><a href="#">税务稽查</a></li>
<li><a href="#">税务违法违章的处罚</a></li>
<li><a href="#">税务机关行政执法的依据</a></li>
<li><a href="#">税务行政处罚听证</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu11')">行政许可</a>
<ul id="ChildMenu11" class="collapsed">
<li id="border_top"><a href="#">企业衔头发票印制审批</a></li>
<li><a href="#">企业衔头发票印制审批</a></li>
<li><a href="#">企业衔头发票印制审批</a></li>
<li><a href="#">企业衔头发票印制审批</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu12')">税收优惠</a>
<ul id="ChildMenu12" class="collapsed">
<li id="border_top"><a href="#">车辆购置税减免税</a></li>
<li><a href="#">车辆购置税减免税</a></li>
<li><a href="#">车辆购置税减免税</a></li>
<li><a href="#">车辆购置税减免税</a></li>
<li><a href="#">车辆购置税减免税</a></li>
<li><a href="#">车辆购置税减免税</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu13')">行政救济</a>
<ul id="ChildMenu13" class="collapsed">
<li id="border_top"><a href="#">税务行政赔偿业务流程</a></li>
<li><a href="#">税务行政赔偿业务流程</a></li>
<li><a href="#">税务行政赔偿业务流程</a></li>
<li><a href="#">税务行政赔偿业务流程</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu14')">税务代理</a>
<ul id="ChildMenu14" class="collapsed">
<li id="border_top"><a href="#">代理的申请</a></li>
<li><a href="#">代理的申请</a></li>
<li><a href="#">代理的申请</a></li>
<li><a href="#">代理的申请</a></li>
<li><a href="#">代理的申请</a></li>
</ul>
</li>
<li id="bottom_none"><a href="#" onClick="DoMenu('ChildMenu15')">担保担保</a>
<ul id="ChildMenu15" class="collapsed">
<li id="border_top"><a href="#">担保</a></li>
</ul>
</li>
</ul>
</div>
<div class="m_right"></div>
</div>
CSS样式： body{margin:0px;padding:0px;color:#585858;font-size:12px;font-family: "宋体";line-height:20px;}
.clear{clear:both;}
ul{margin: 0;padding: 0;list-style-type: none;}
.main_2{width:805px; float:right;}
.m_left{width:190px; float:left;}
.m_right{ width:608px; float:right;}
.nav {
width:190px;
list-style-type: none;
text-align:left;
overflow:hidden;
}
.nav a {
width: 168px;
display: block;
padding-left:10px;
}
.nav li {
border-top:#ebebeb 1px solid;
border-bottom:#ebebeb 1px solid;
float:left;
line-height:28px;
background-color: #f5f5f5;font-weight:bold;
}
.nav li a{
background-image: url(../images/jiantou.gif);
background-repeat: no-repeat;
background-position: 10px 12px;
padding-left:20px;
font-size: 14px;
color:#585858;
text-decoration: none;
}
.nav li a:hover,.nav li a.hover{
color:#4c657e;
background-color: #f5f5f5;
}
.nav li ul {
list-style:none;
text-align:left;
}
.nav li ul li{
border:none;
background-color: #fff;
padding-left:3px;
background-image: url(../images/dian.gif);
background-repeat: no-repeat;
background-position: 15px 10px; font-weight:normal;
}
.nav li ul li a{
background-image: none;
font-size:12px;
}
.nav li ul li a:hover,.nav li ul li a.hover {
color:#4c657e;
text-decoration:none;
font-weight:normal;
background:none;
background-image: none;
}
.nav ul.collapsed {
display: none;
}
#bottom_none{
border-bottom: none;
}
#border_top{
border-top: solid 1px #ebebeb;
}
js： var LastLeftID = "";
function menuFix() {
var obj = document.getElementByIdx_x("nav").getElementsByTagName_r("li");
for (var i=0; i<obj.length; i++) {
obj[i].οnmοuseοver=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
obj[i].onMouseDown=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
obj[i].onMouseUp=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
obj[i].οnmοuseοut=function() {
this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"), "");
}
}
}
function DoMenu(emid)
{
var obj = document.getElementByIdx_x(emid);
obj.className = (obj.className.toLowerCase() == "expanded"?"collapsed":"expanded");
if((LastLeftID!="")&&(emid!=LastLeftID)) //关闭上一个Menu
{
document.getElementByIdx_x(LastLeftID).className = "collapsed";
}
LastLeftID = emid;
}
function GetMenuID()
{
var MenuID="";
var _paramStr = new String(window.location.href);
var _sharpPos = _paramStr.indexOf("#");
if (_sharpPos >= 0 && _sharpPos < _paramStr.length - 1)
{
_paramStr = _paramStr.substring(_sharpPos + 1, _paramStr.length);
}
else
{
_paramStr = "";
}
if (_paramStr.length > 0)
{
var _paramArr = _paramStr.split("&");
if (_paramArr.length>0)
{
var _paramKeyVal = _paramArr[0].split("=");
if (_paramKeyVal.length>0)
{
MenuID = _paramKeyVal[1];
}
}
}
if(MenuID!="")
{
DoMenu(MenuID)
}
}
GetMenuID(); //*这两个function的顺序要注意一下，不然在Firefox里GetMenuID()不起效果
menuFix();
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