看了视频似懂非懂，根据视频做的

看了视频似懂非懂，var a=$(this).index();$(".box").eq(a).css("background","green").siblings(".box").css("background","#CCC");不懂

<!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>选项卡</title>
<style>
.btn{ width:120px; height:50px; background:#CCC; text-align:center; line-height:50px; margin:20px 0;}
.box{ width:400px; height:200px; background:#CCC;text-align:center;line-height:200px; margin:10px 0; font-size:20px}
</style>

<script src="新建文件夹 (2)/jquery-3.0.0/jquery-3.0.0.min.js"></script>
<script>
$(function(){
$(".btn").click(function(){
var a=$(this).index();

$(this).css("background","red").siblings(".btn").css("background","#CCC");
$(".box").eq(a).css("background","green").siblings(".box").css("background","#CCC");

})

})
</script>
</head>

<body>
<div class="btn">按钮1</div>
<div class="btn">按钮2</div>
<div class="btn">按钮3</div>
<div class="btn">按钮4</div>

<div class="box">盒子1</div>
<div class="box">盒子2</div>
<div class="box">盒子3</div>
<div class="box">盒子4</div>
</body>
</html>

[提问] 看了视频似懂非懂，根据视频做的

共0个回复最后回复于 2018-7-31 09:42

	B Color Image Link Quote Code Smilies 高级模式您需要登录后才可以回帖登录 \| 立即注册本版积分规则回帖后跳转到最后一页

[提问] 看了视频似懂非懂，根据视频做的

共0个回复 最后回复于 2018-7-31 09:42

共0个回复最后回复于 2018-7-31 09:42