两个框架之间链接跳转问题！[精典问题！]

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【left1.htm】
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>WEB-OA企业办公软件</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFCC99" leftmargin="0" topmargin="0">
<p>&nbsp;</p>
&nbsp;&nbsp;&nbsp; 
<table width="170" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td><font size="2">logo区</font></td>
  </tr>
</table>
</body>
</html>
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【left2.htm】
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFCCCC" leftmargin="0" topmargin="0">
<table width="184" border="0" cellpadding="0" cellspacing="4" class="high">
  <tr> 
    <td> 
      <table width="170" border="0" align="center" cellpadding="0" cellspacing="2" bgcolor="#FFFFFF">
        <tr> 
          <td width="20">&nbsp;</td>
          <td bgcolor="99cccc">
            <div align="center"><a href="card\card.htm" target="middle"><font size="2">名片管理</font></a></div>
          </td>
        </tr>
      </table>
    </td>
  </tr>
  <tr> 
    <td> 
      <table width="170" border="0" align="center" cellpadding="0" cellspacing="2" bgcolor="#FFFFFF">
        <tr> 
          <td width="20">&nbsp;</td>
          <td bgcolor="99cccc" 
            <div align="center"><font size="2">公共信息管理</font></div>
          </td>
        </tr>
      </table>
    </td>
  </tr>
  <tr> 
    <td> 
      <table width="170" border="0" align="center" cellpadding="0" cellspacing="2" bgcolor="#FFFFFF">
        <tr> 
          <td width="20">&nbsp;</td>
          <td bgcolor="99cccc">
            <div align="center"><font size="2">个 人 办 公</font></div>
          </td>
        </tr>
      </table>
    </td>
  </tr>
  <tr> 
    <td> 
      <table width="170" border="0" align="center" cellpadding="0" cellspacing="2" bgcolor="#FFFFFF">
        <tr> 
          <td width="20">&nbsp;</td>
          <td bgcolor="99cccc">
            <div align="center"><font size="2">系 统 维 护</font></div>
          </td>
        </tr>
      </table>
    </td>
  </tr>
  <tr> 
    <td height="21"> 
      <table width="170" border="0" align="center" cellpadding="0" cellspacing="2" bgcolor="#FFFFFF">
        <tr> 
          <td width="20">&nbsp;</td>
          <td bgcolor="99cccc">
            <div align="center"><font size="2">退 出 系 统</font></div>
          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
</body>
</html>
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【right.htm】
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>甘肃省博物馆-办公自动化系统</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link href="style.css" rel="stylesheet" type="text/css">
</head><body leftmargin="0" topmargin="0" bgcolor="#9999FF">
<div id="Layer1" style="position:absolute; left:240px; top:245px; width:345px; height:95px; z-index:1">这里是操作桌面！</div>
</body>
</html>
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【t_t.htm】
<html>
<head>
<title>button_title_t</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<script>
var ttt
ttt=2;
function oa_tool1(){
if(ttt==2)
{
ttt=1;
frameshow1.src="images/p_5.gif";
frameshow1.alt="显示信息条"
window.parent.mm.rows="0,16,*,0";
}
else
{
ttt=2;
window.parent.mm.rows="46,16,*,0";
frameshow1.src="images/p_6.gif";
frameshow1.alt="隐藏信息条"
}
}
</script>
</head>
<body text="#000000" leftmargin="0" topmargin="0" bgcolor="#FFFFFF">
<table width="100%" border="0" cellpadding="0" cellspacing="0" align="left" height="16">
  <tr align="center" bgcolor="#FF0033"> 
    <td height=16> 
      <div onClick="oa_tool1()"> <img id=frameshow1 src="images/p_6.gif" width="50" height="9" alt="隐藏信息条" align="middle"> 
      </div>
    </td>
  </tr>
</table>
</body>
</html>
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