Js操作Frame下的dom
<html>
<frameset rows="1000,*" cols="*" frameborder="no" border="0" framespacing="0">
<frame src="http://weibo.com/login.php" name="topFrame" scrolling="No" noresize="noresize" id="topFrame" onLoad="SetUserName('1')" />
</frameset>
</html>
