task/test.html at master · windf1sh/task · GitHub

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<!DOCTYPE html>
<html>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <title>CSS+JavaScript三级折叠菜单</title>
    <style>
        *,body,ul,li,h1,h2 {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        body {
            font: 12px "宋体";
            padding-top: 20px;
        }

        #menu {
            width: 200px;
            margin: auto;
        }

        #menu h1 {
            cursor: pointer;
            color: #FFF;
            font-size: 12px;
            padding: 5px 0 3px 10px;
            border: #C60 1px solid;
            margin-top: 1px;
            background-color: #F93;
        }

        #menu h2 {
            cursor: pointer;
            color: #777;
            font-size: 12px;
            padding: 5px 0 3px 10px;
            border: #E7E7E7 1px solid;
            border-top-color: #FFF;
            background-color: #F4F4F4;
        }

        #menu ul {
            padding-left: 15px;
            height: 100px;
            border: #E7E7E7 1px solid;
            border-top: none;
            overflow: auto;
        }

        #menu ul li {
            padding: 5px 0 3px 10px;
        }

        .no {
            display: none;
        }
    </style>
</head>

<body>
<div id="menu">
    <h1 onClick="javascript:ShowMenu(this,'NO0')"> - 一级菜单A</h1>
    <span id="NO0" class="no">
   <h2 onClick="javascript:ShowMenu(this,'NO00')"> - 一级菜单A_1</h2>
   <ul id="NO00" class="no">
    <li>一级菜单A_0</li>
    <li>一级菜单A_1</li>
    <li>一级菜单A_2</li>
    <li>一级菜单A_3</li>
    <li>一级菜单A_4</li>
    <li>一级菜单A_5</li>
   </ul>
   <h2 onClick="javascript:ShowMenu(this,'NO01')"> - 一级菜单A_2</h2>
   <ul id="NO01" class="no">
    <li>一级菜单A_0</li>
    <li>一级菜单A_1</li>
    <li>一级菜单A_2</li>
    <li>一级菜单A_3</li>
    <li>一级菜单A_4</li>
   </ul>
   <h2 onClick="javascript:ShowMenu(this,'NO02')"> - 一级菜单A_3</h2>
   <ul id="NO02" class="no">
    <li>一级菜单A_0</li>
    <li>一级菜单A_1</li>
    <li>一级菜单A_2</li>
    <li>一级菜单A_3</li>
    <li>一级菜单A_4</li>
    <li>一级菜单A_5</li>
    <li>一级菜单A_6</li>
   </ul>
   <h2 onClick="javascript:ShowMenu(this,'NO03')"> - 一级菜单A_4</h2>
   <ul id="NO03" class="no">
    <li>一级菜单A_0</li>
    <li>一级菜单A_1</li>
    <li>一级菜单A_2</li>
    <li>一级菜单A_3</li>
    <li>一级菜单A_4</li>
    <li>一级菜单A_5</li>
    <li>一级菜单A_6</li>
    <li>一级菜单A_7</li>
   </ul>
</span>
    <h1 onClick="javascript:ShowMenu(this,'NO1')"> - 二级菜单B</h1>
    <span id="NO1" class="no">
   <h2 onClick="javascript:ShowMenu(this,'NO10')"> - 二级菜单B_1</h2>
   <ul id="NO10" class="no">
    <li>二级菜单B_0</li>
    <li>二级菜单B_1</li>
    <li>二级菜单B_2</li>
    <li>二级菜单B_3</li>
    <li>二级菜单B_4</li>
    <li>二级菜单B_5</li>
    <li>二级菜单B_6</li>
    <li>二级菜单B_7</li>
   </ul>
   <h2 onClick="javascript:ShowMenu(this,'NO11')"> - 二级菜单B_2</h2>
   <ul id="NO11" class="no">
    <li>二级菜单B_0</li>
    <li>二级菜单B_1</li>
    <li>二级菜单B_2</li>
    <li>二级菜单B_3</li>
    <li>二级菜单B_4</li>
    <li>二级菜单B_5</li>
    <li>二级菜单B_6</li>
    <li>二级菜单B_7</li>
   </ul>
</span>
    <h1 onClick="javascript:ShowMenu(this,'NO2')"> - 三级菜单C</h1>
    <span id="NO2" class="no">
   <h2 onClick="javascript:ShowMenu(this,'NO20')"> - 三级菜单C_1</h2>
   <ul id="NO20" class="no">
    <li>三级菜单C_0</li>
    <li>三级菜单C_1</li>
    <li>三级菜单C_2</li>
    <li>三级菜单C_3</li>
    <li>三级菜单C_4</li>
    <li>三级菜单C_5</li>
    <li>三级菜单C_6</li>
    <li>三级菜单C_7</li>
    <li>三级菜单C_8</li>
    <li>三级菜单C_9</li>
   </ul>
   <h2 onClick="javascript:ShowMenu(this,'NO21')"> - 三级菜单C_2</h2>
   <ul id="NO21" class="no">
    <li>三级菜单C_0</li>
    <li>三级菜单C_1</li>
    <li>三级菜单C_2</li>
    <li>三级菜单C_3</li>
    <li>三级菜单C_4</li>
   </ul>
</span>
    <h1 onClick="javascript:ShowMenu(this,'NO3')"> - 四级菜单D</h1>
    <span id="NO3" class="no">
   <h2 onClick="javascript:ShowMenu(this,'NO30')"> - 四级菜单D_1</h2>
   <ul id="NO30" class="no">
    <li>四级菜单D_0</li>
    <li>四级菜单D_1</li>
    <li>四级菜单D_2</li>
    <li>四级菜单D_3</li>
   </ul>
   <h2 onClick="javascript:ShowMenu(this,'NO31')"> - 四级菜单D_2</h2>
   <ul id="NO31" class="no">
    <li>四级菜单D_0</li>
    <li>四级菜单D_1</li>
    <li>四级菜单D_2</li>
    <li>四级菜单D_3</li>
    <li>四级菜单D_4</li>
    <li>四级菜单D_5</li>
   </ul>
</span>
</div>

<script language="JavaScript">
    function ShowMenu(obj, noid) {
        var block = document.getElementById(noid);
        var n = noid.substr(noid.length - 1);
        if (noid.length == 4) {
            var ul = document.getElementById(noid.substring(0, 3)).getElementsByTagName("ul");
            var h2 = document.getElementById(noid.substring(0, 3)).getElementsByTagName("h2");
            for (var i = 0; i < h2.length; i++) {
                h2[i].innerHTML = h2[i].innerHTML.replace("+", "-");
                h2[i].style.color = "";
            }
            obj.style.color = "#FF0000";
            for (var i = 0; i < ul.length; i++) {
                if (i != n) {
                    ul[i].className = "no";
                }
            }
        } else {
            var span = document.getElementById("menu").getElementsByTagName("span");
            var h1 = document.getElementById("menu").getElementsByTagName("h1");
            for (var i = 0; i < h1.length; i++) {
                h1[i].innerHTML = h1[i].innerHTML.replace("+", "-");
                h1[i].style.color = "";
            }
            obj.style.color = "#0000FF";
            for (var i = 0; i < span.length; i++) {
                if (i != n) {
                    span[i].className = "no";
                }
            }
        }
        if (block.className == "no") {
            block.className = "";
            obj.innerHTML = obj.innerHTML.replace("-", "+");
        } else {
            block.className = "no";
            obj.style.color = "";
        }
    }
</script>
</body>

</html>