diff --git a/index.htm b/index.htm
index ed4bd88..77975bf 100644
--- a/index.htm
+++ b/index.htm
@@ -12,7 +12,7 @@
 	<table border="0" width="100%" height="100%" bordercolordark="#C0C0C0" cellspacing="9">
 		<tr>
 			<td width="160" valign="top" height="100%" bgcolor="#F5F5F5">
-			<iframe name="I2" src="daohang.htm" height="500" scrolling="no" border="0" frameborder="0" width="160">
+			<iframe name="I2" src="daohang.htm" height="100%" scrolling="no" border="0" frameborder="0" width="160">
 			浏览器不支持嵌入式框架，或被配置为不显示嵌入式框架。</iframe>
 			<p>　</p>
 			<p>　</td>