<!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>
<script type="text/javascript" src="js/jquery-1.7.2.js"></script>
<script type="text/javascript">
$(function(){
//测试 jQuery 样式相关的方法.
//1. hasClass(): 某元素是否有指定的样式
alert($("div:first").hasClass("SubCategoryBox")); //true
//2. 移除样式
$("div:first").removeClass("SubCategoryBox");
alert($("div:first").hasClass("SubCategoryBox"));
//3. 添加样式
$("div:first").addClass("SubCategoryBox");
//4. 切换样式: 存在, 则去除; 没有, 则添加.
$(".showmore").click(function(){
$("div:first").toggleClass("SubCategoryBox");
return false;
});
//5. 获取和设置元素透明度: opacity 属性
alert($("div:first").css("opacity"));
$("div:first").css("opacity", 0.5);
//6. width 和 height
alert($("div:first").width());
alert($("div:first").height());
$("div:first").width(400);
$("div:first").height(80);
//7. 获取元素在当前视窗中的相对位移: offset().
//其返回对象包含了两个属性: top, left. 该方法只对可见元素有效
alert($("div:first").offset().top);
alert($("div:first").offset().left);
});
</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>
实现上面的按钮的事件
<!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>
<script type="text/javascript" src="js/jquery-1.7.2.js"></script>
<script type="text/javascript">
$(function(){
var $categary = $("li:gt(5):not(:last)");
$categary.hide();
$(".showmore").click(function(){
if($categary.is(":hidden")){
$categary.show();
//改变样式
$("li:contains('佳能'),li:contains('尼康')").addClass("promoted");
//设置文字
$(".showmore > a > span").text("显示精简品牌");
//设置图片
$(".showmore > a > span").css("bakground", "url(img/up.gif) no-repeat 0 0");
}else{
$categary.hide();
$("li").removeClass("promoted");
$(".showmore > a > span").text("全部品牌");
$(".showmore > a > span").css("bakground", "url(img/down.gif) no-repeat 0 0");
}
return false;
});
});
</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>
附件：http://down.51cto.com/data/2364961
