js实现无限级树形导航列表

js实现无限级树形导航列表

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<head>
<title>js实现的无限级树形下拉导航列表 </title>
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    *{ margin:0; padding:0;    list-style:none;}
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    h2 { font-family:"黑体"; font-size:24px; text-align:center; line-height:32px;}
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    #nav a { text-decoration:underline;color:#06c; font-size:14px; line-height:24px;}
    #nav ul{ margin-bottom:5px;}
    #nav strong{ color:#696;}
    #nav.dyn li ul{ display:none;}
    #nav.dyn li ul.show{ display:block;}
    #nav.dyn li{ padding-left:15px;}
    #nav.dyn li.parent{    background:url(user_23.gif) 5px 10px no-repeat;}
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<h2>js实现无限级树形导航列表</h2>
<ul id="nav">
   
    <li><a href="#">产品目录</a>
        <ul>
            <li><a href="#">大类别一</a>
                <ul>
                    <li><a href="#">小类别一</a>
                        <ul>
                            <li><a href="#">次类别一</a></li>
                            <li><a href="#">次类别二</a></li>
                        </ul>
                    </li>
                    <li><a href="#">小类别二</a></li>
                </ul>
            </li>
            <li><a href="#">大类别二</a></li>
            <li><a href="#">大类别三</a>
                <ul>
                    <li><a href="#">小类别一</a></li>
                    <li><a href="#">小类别二</a></li>
                </ul>
            </li>
        </ul>
    </li>
    <li><a href="#">服务</a>
        <ul>
            <li><a href="#">大类别一</a>
               <ul>
                    <li><a href="#">小类别一</a></li>
                    <li><a href="#">小类别二</a></li>
                </ul>
            </li>
            <li><a href="#">大类别二</a>
                 <ul>
                    <li><a href="#">小类别一</a></li>
                    <li><a href="#">小类别二</a></li>
                </ul>
            </li>
            <li><a href="#">大类别三</a>
                 <ul>
                    <li><a href="#">小类别一</a></li>
                    <li><a href="#">小类别二</a></li>
                </ul>
            </li>
        </ul>
    </li>
</ul>
</body>
</html>

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