ifream的使用

<table border="1" width="100%" height="100%">
	<tr height="20%"><td colspan="2">top</td></tr>
	<tr height="80%">
		
		<td width="20%">
			<a href="index.htm" target="main">index.html</a>
		</td>
		
		<td width="80%">
			<iframe name="main" width="100%" height="100%"/>
		</td></tr>
</table>