本文執行個體講述了JS+CSS實作類別似QQ好友及黑名單效果的樹型菜單。分享給大家供大家參考。具體如下：
今天介紹的這個菜單堪稱極品啊，不過裡面的有些表徵圖丟失了，路徑還留在那，真想使用的朋友自己製作兩個摺疊菜單的表徵圖按路徑傳上去就行了，這個菜單是模仿QQ面板的菜單功能，很多朋友還是很喜歡這種功能的，沒想到用這麼少的JS代碼也可實現 ，值得代簽哦。
運行效果截圖如下：
線上示範地址如下：
http://demo.jb51.net/js/2015/js-css-qq-hy-hmd-style-menu-codes/
具體代碼如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><TITLE>QQ好友/黑名單的樹型菜單</TITLE></HEAD><BODY><script>if (!document.getElementById) document.getElementById = function() { return null; }function initializeMenu(menuId, actuatorId) { var menu = document.getElementById(menuId); var actuator = document.getElementById(actuatorId); if (menu == null || actuator == null) return; actuator.parentNode.style.backgroundImage = "url()"; actuator.onclick = function() { var display = menu.style.display; this.parentNode.style.backgroundImage = (display == "block") ? "url()" : "url()"; menu.style.display = (display == "block") ? "none" : "block"; return false; }} window.onload = function() { initializeMenu("productsMenu", "productsActuator"); initializeMenu("newPhonesMenu", "newPhonesActuator"); initializeMenu("compareMenu", "compareActuator"); }</script><style>body { font-family: verdana, helvetica, arial, sans-serif;}#mainMenu { background-color: #EEE; border: 1px solid #CCC; color: #000; width: 203px;}#menuList { margin: 0px; padding: 10px 0px 10px 15px;}li.menubar { background: url() no-repeat 0em 0.3em; font-size: 12px; line-height: 1.5em; list-style: none outside;}.menu, .submenu { display: none; margin-left: 15px; padding: 0px;}.menu li, .submenu li { background: url() no-repeat 0em 0.3em; list-style: none outside;}a.actuator { background-color: transparent; color: #000; font-size: 12px; padding-left: 15px; text-decoration: none;}a.actuator:hover { text-decoration: underline;}.menu li a, .submenu li a { background-color: transparent; color: #000; font-size: 12px; padding-left: 15px; text-decoration: none;}.menu li a:hover, submenu li a:hover { text-decoration: underline;}span.key { text-decoration: underline;}</style></head><body><div id="mainMenu"> <ul id="menuList"> <li class="menubar"> <a href="#" id="productsActuator" class="actuator">圖秀地帶收藏夾</a> <ul id="productsMenu" class="menu"> <li> <a href="#" id="newPhonesActuator" class="actuator">我的好友</a> <ul id="newPhonesMenu" class="submenu"> <li><a href="#">張三[10000001]</a></li> <li><a href="#">李四[10000002]</a></li> <li><a href="#">張三[10000001]</a></li> <li><a href="#">李四[10000002]</a></li> </ul> </li> <li> <a href="#" id="compareActuator" class="actuator">陌生人</a> <ul id="compareMenu" class="submenu"> <li><a href="#">張三[10000001]</a></li> <li><a href="#">李四[10000002]</a></li> <li><a href="#">張三[10000001]</a></li> <li><a href="#">李四[10000002]</a></li> </ul> </li> </ul> </li> </ul> </div> </body></BODY></HTML>
希望本文所述對大家的JavaScript程式設計有所協助。
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