JQ 收起和展开的菜单

<!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></title>
<style type="text/css">
 *{ margin:0; padding:0;}
body {font-size:12px;text-align:center;}
a { color:#04D; text-decoration:none;}
a:hover { color:#F50; text-decoration:underline;}
.SubCategoryBox {width:600px; margin:0 auto; text-align:center;margin-top:40px;}
.SubCategoryBox ul { list-style:none;}
.SubCategoryBox ul li { display:block; float:left; width:200px; line-height:20px;}
.showmore { clear:both; text-align:center;padding-top:10px;}
.showmore a { display:block; width:120px; margin:0 auto; line-height:24px; border:1px solid #AAA;}
.showmore a span { padding-left:15px; background:url(img/down.gif) no-repeat 0 0;}
.promoted a { color:#F50;}
</style>
<!-- 引入jQuery -->
<script src="js/jquery-1.10.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){ //  等待DOM加载完毕.
	var $category = $('ul li:gt(5):not(:last)'); //  获得索引值大于5的品牌集合对象(除最后一条)	
	$category.hide(); //  隐藏上面获取到的jQuery对象。
	var $toggleBtn = $('div.showmore > a'); //  获取“显示全部品牌”按钮
	$toggleBtn.click(function(){
		  if($category.is(":visible")){
				$category.hide(); //  隐藏$category
				$('.showmore a span')
					.css("background","url(img/down.gif) no-repeat 0 0")      
					.text("显示全部品牌"); //改变背景图片和文本
				$('ul li').removeClass("promoted");	// 去掉高亮样式
		  }else{
				$category.show(); //  显示$category
				$('.showmore a span')
					.css("background","url(img/up.gif) no-repeat 0 0")      
					.text("精简显示品牌"); //改变背景图片和文本
				$('ul li').filter(":contains('佳能'),:contains('尼康'),:contains('奥林巴斯')")
					.addClass("promoted"); //添加高亮样式
		  }
		return false; //超链接不跳转
	})
})
</script>
</head>
<body>
<div class="SubCategoryBox">
    <ul>
        <li ><a href="#">佳能</a><i>(30440) </i></li>
        <li ><a href="#">索尼</a><i>(27220) </i></li>
        <li ><a href="#">三星</a><i>(20808) </i></li>
        <li ><a href="#">尼康</a><i>(17821) </i></li>
        <li ><a href="#">松下</a><i>(12289) </i></li>
        <li ><a href="#">卡西欧</a><i>(8242) </i></li>
        <li ><a href="#">富士</a><i>(14894) </i></li>
        <li ><a href="#">柯达</a><i>(9520) </i></li>
        <li ><a href="#">宾得</a><i>(2195) </i></li>
        <li ><a href="#">理光</a><i>(4114) </i></li>
        <li ><a href="#">奥林巴斯</a><i>(12205) </i></li>
        <li ><a href="#">明基</a><i>(1466) </i></li>
        <li ><a href="#">爱国者</a><i>(3091) </i></li>
        <li ><a href="#">其它品牌相机</a><i>(7275) </i></li>
    </ul>
    <div class="showmore">
    	<a href="more.html"><span>显示全部品牌</span></a>
    </div>
</div>
</body>
</html>

效果图:

 

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转载自onestopweb.iteye.com/blog/2290048
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