关于嵌入式页面的高度问题，求教，高分！！！！！

这样写：
Main.htm
=======================
<html><head>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>新建网页 1</title>
</head>
<body>
<p>
<iframe name="I1" id="I1" src="Untitled2.xml" style="height:100"></iframe></p>
</body>
</html>noteclass.xsl
=================================
<?xml version="1.0" encoding="gb2312"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/TR/WD-xsl">
  <xsl:template match="/">
    <html>
      <head>
        <meta http-equiv="Content-Type" content="text/html; charset=GB2312"/>
        <title>note</title>
        <link REL="Stylesheet" HREF="/style.css" TYPE="text/css"/>
        <style>
textarea.content{
overflow-y:visible;
border:0px;
font-size:12px;
font-family:Fixedsys 宋体;
line-height:150%;
overflow:visible;
border-width:0px;
width:760px;
height:40px;
}
</style>
        <script language="Javascript">
          <xsl:comment><![CDATA[
function window.onload()
{
parent.document.all("I1").style.height=document.body.scrollHeight+15;
parent.document.all("I1").style.width=document.body.scrollWidth+10; }
]]></xsl:comment>
        </script>
      </head>
      <body topmargin="0" leftmargin="0">
        <xsl:for-each select="Replys/Reply">
          <div align="center">
            <center>
              <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse;TABLE-LAYOUT: fixed;" bordercolor="#111111" width="760">
                <tr>
                  <td width="535" bgcolor="#F1F5FA" height="22" class="text7">
       &#160;回复人：
       <xsl:value-of select="PostUserName"/>
                  </td>
                  <td width="235" bgcolor="#F1F5FA" height="22" class="text4">
                    <p align="center">
                      <xsl:value-of select="PostDateTime"/>
                    </p>
                  </td>
                </tr>
                <tr>
                  <td width="770" height="1" bgcolor="#0066CC" colspan="2"/>
                </tr>
                <tr>
                  <td width="770" height="10" colspan="2"/>
                </tr>
              </table>
            </center>
          </div>
          <p align="center">
            <textarea name="notearea" class="content" readonly="true">
              <xsl:value-of select="Content"/>
            </textarea>
          </p>
        </xsl:for-each>
      </body>
    </html>
  </xsl:template>
</xsl:stylesheet>