jQuery uses serial writing to achieve the folding menu effect_jquery
本文实例讲述了jQuery采用连缀写法实现的折叠菜单效果。分享给大家供大家参考。具体如下：
这是一款jQuery采用连缀写法实现的折叠菜单效果，作者是位高手啊，自己用jQuery的连缀写法编写的，差不多是手风琴菜单，功能是实现了，不过有点担心效率，作者希望与高人一起交流进步。
运行效果截图如下：
在线演示地址如下：
http://demo.jb51.net/js/2015/jquery-lz-fade-in-menu-style-codes/
具体代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>1-5-1</title>
<style>
/** 清除内外边距 **/
body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, /* structural elements 结构元素 */
dl, dt, dd, ul, ol, li, /* list elements 列表元素 */
pre, /* text formatting elements 文本格式元素 */
form, fieldset, legend, button, input, textarea, /* form elements 表单元素 */
th, td /* table elements 表格元素 */ {
margin: 0;
padding: 0;
}
body,button, input, select, textarea {
font: 12px/1.5 tahoma, arial, \5b8b\4f53, sans-serif;
}
h1, h2, h3, h4, h5, h6 { font-size: 100%; }
address, cite, dfn, em, var { font-style: normal; } /* 将斜体扶正 */
code, kbd, pre, samp { font-family: courier new, courier, monospace; } /* 统一等宽字体 */
small { font-size: 12px; } /* 小于 12px 的中文很难阅读，让 small 正常化 */
ul, ol { list-style: none; }
/** 重置文本格式元素 **/
a { text-decoration: none; }
a:hover { text-decoration: underline; }
sup { vertical-align: text-top; } /* 重置，减少对行高的影响 */
sub { vertical-align: text-bottom; }
/** 重置表单元素 **/
legend { color: #000; } /* for ie6 */
fieldset, img { border: 0; } /* img 搭车：让链接里的 img 无边框 */
button, input, select, textarea { font-size: 100%; } /* 使得表单元素在 ie 下能继承字体大小 */
/* 注：optgroup 无法扶正 */
/** 重置表格元素 **/
table { border-collapse: collapse; border-spacing: 0; }
</style>
<style type="text/css">
#menu{width:300px;overflow:hidden}
#menu dt{background:#ccc;color:#fff;cursor:pointer}
#menu dd{background:#f4f4f4;color:#fff;;display:none}
#menu dt.hover{background:green}
</style>
<script type="text/javascript" src="jquery1.3.2.js" ></script>
<script type="text/javascript">
$(function(){
$("dl").mouseover(function(){
$(this).children('dt').addClass('hover').end().children("dd").show();
$(this).siblings().children('dt').removeClass("hover").end().end().siblings().children("dd").hide();
});
});
</script>
</head>
<body>
<div id="menu">
<dl>
<dt>第1章-认识jQuery</dt>
<dd><a href="#">1.1-JavaScript和JavaScript库</a></dd>
<dd><a href="#">1.2-加入jQuery</a></dd>
<dd><a href="#">1.3-编写简单jQuery代码</a></dd>
<dd><a href="#">1.4-jQuery对象和DOM对象</a></dd>
</dl>
<dl>
<dt>第2章-jQuery选择器</dt>
<dd><a href="#">2.1-jQuery选择器是什么</a></dd>
<dd><a href="#">2.2-jQuery选择器的优势</a></dd>
<dd><a href="#">2.3-jQuery选择器</a></dd>
<dd><a href="#">2.4-应用jQuery改写示例</a></dd>
</dl>
<dl>
<dt>第3章-jQuery中的DOM操作</dt>
<dd><a href="#">3.1-DOM操作的分类</a></dd>
<dd><a href="#">3.2-jQuery中的DOM操作</a></dd>
</dl>
</div>
</body>
</html>
希望本文所述对大家的jQuery程序设计有所帮助。
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