IE6-IE9中tbody的innerHTML不能赋值，重现代码如下
Js代码
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8/>
<title>IE6-IE9中tbody的innerHTML不能复制bug</title>
</head>
<body style=height:3000px>
<table>
<tbody>
<tr><td>aaa</td></tr>
</tbody>
</table>
<p>
<button id=btn1>GET</button><button id=btn2>SET</button>
<
