middel.html

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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
<!--
body {
	margin-left: 0px;
	margin-top: 0px;
	margin-right: 0px;
	margin-bottom: 0px;
}
-->
</style>
<style> 
.navPoint { 
COLOR: white; CURSOR: hand; FONT-FAMILY: Webdings; FONT-SIZE: 9pt 
} 
</style> 
<script>
function switchSysBar(){ 
var locate=location.href.replace('middel.html','');
var ssrc=document.all("img1").src.replace(locate,'');
if (ssrc=="images/main_30.gif")
{ 
document.all("img1").src="images/main_30_1.gif";
document.all("frmTitle").style.display="none" 
} 
else
{ 
document.all("img1").src="images/main_30.gif";
document.all("frmTitle").style.display="" 
} 
} 
</script>

</head>

<body style="overflow:hidden">
<table width="100%" height="100%" border="0" cellpadding="0" cellspacing="0">
  <tr>
    <td width="156" id=frmTitle noWrap name="fmTitle" align="center" valign="top">
	<iframe name="I1" height="100%" width="170" src="mygo.aspx" border="0" frameborder="0" scrolling="no">
</iframe>	</td>
    <td width="4" valign="middle" background="images/main_27.gif" onclick=switchSysBar()><SPAN class=navPoint 
id=switchPoint title=关闭/打开左栏><img src="images/main_30.gif" name="img1" width=4 height=47 id=img1></SPAN></td>
    <td align="center" valign="top"><iframe name="I2" height="100%" width="100%" border="0" frameborder="0" src="right.html"> 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></td>
  </tr>
</table>
</body>
</html>