代码示例:(标识:eg_js_jquery_gethtml)
<!DOCTYPE html>
<html>
<head>
<script src="/jquery/jquery.min.js"></script>
</head>
<body>

<h1>设置 HTML</h1>

<div id="01">
  <h2>Hello China!</h2>
</div>
<div id="02">
  <h2>Hello World!</h2>
</div>

<script>
$(document).ready(function() {
  var content = $("#01").html();
  $("#02").html(content);
});
</script>

</body>
</html>
运行结果: