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Javascript制作伸缩的二级菜单
<style> #navigation { width: 200px; font-family: Arial; } #navigation > ul { list-style-type: none; /* 不显示项目符号 */ margin: 0px; padding: 0px; } #navigation > ul > li { border-bottom: 1px solid #ED9F9F; /* 添加下划线 */ } #navigation > ul > li > a { display: block; /* 区块显示 */ padding: 5px 5px 5px 0.5em; text-decoration: none; border-left: 12px solid #711515; /* 左边的粗红边 */ border-right: 1px solid #711515; /* 右侧阴影 */ } #navigation > ul > li > a:link, #navigation > ul > li > a:visited { background-color: #c11136; color: #FFFFFF; } #navigation > ul > li > a:hover { /* 鼠标经过时 */ background-color: #990020; /* 改变背景色 */ color: #ffff00; /* 改变文字颜色 */ } /* 子菜单的CSS样式 */ #navigation ul li ul { list-style-type: none; margin: 0px; padding: 0px 0px 0px 0px; } #navigation ul li ul li { border-top: 1px solid #ED9F9F; } #navigation ul li ul li a { display: block; padding: 3px 3px 3px 0.5em; text-decoration: none; border-left: 28px solid #a71f1f; border-right: 1px solid #711515; } #navigation ul li ul li a:link, #navigation ul li ul li a:visited { background-color: #e85070; color: #FFFFFF; } #navigation ul li ul li a:hover { background-color: #c2425d; color: #ffff00; } #navigation ul li ul.myHide { /* 隐藏子菜单 */ display: none; } #navigation ul li ul.myShow { /* 显示子菜单 */ display: block; } </style> <script type="text/javascript"> function changemenu() { //通过父元素li,找到兄弟元素ul var bList = this.parentNode.getElementsByTagName("ul")[0]; //CSS交替更换来实现显、隐 if (bList.className == "myHide") bList.className = "myShow"; else bList.className = "myHide"; } window.onload = function() { var oList = document.getElementById("listUL"); var nList = oList.childNodes; //子元素 var sList; for (var i = 0; i < nList.length; i++) { //如果子元素为li,且这个li有子菜单ul if (nList[i].tagName == "LI" && nList[i].getElementsByTagName("ul").length) { slist = nList[i].firstChild; //找到超链接 slist.onclick = changemenu; //动态添加点击函数 } } } </script> <div> <div id="navigation"> <ul id="listUL"> <li><a href="#">Home</a> </li> <li><a href="#">News</a> <ul class="myHide"> <li><a href="#">Lastest News</a> </li> <li><a href="#">All News</a> </li> </ul> </li> <li><a href="#">Sports</a> <ul class="myHide"> <li><a href="#">Basketball</a> </li> <li><a href="#">Football</a> </li> <li><a href="#">Volleyball</a> </li> </ul> </li> <li><a href="#">Weather</a> <ul class="myHide"> <li><a href="#">Today‘s Weather</a> </li> <li><a href="#">Forecast</a> </li> </ul> </li> <li><a href="#">Contact Me</a> </li> </ul> </div> </div>
Javascript制作伸缩的二级菜单
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