<!DOCTYPE html>
<html>
<head>
<title>.class选择器</title>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js" type="text/javascript"></script>
</head>
<body>
<div id="div1" class="red">立正，向我这边看齐</div>
<div id="div2" class="green">我先歇歇脚</div>
</body>
<script type="text/javascript">
var $redHTML = $(".red").html();
$(".green").html($redHTML);
</script>
</html>
为什么没有效果？
