一下却提示newwnd.mydiv对象找不到，搞不懂，为什么啊！

[迭代法]

为什么老是一下可以完全正确
一下却提示newwnd.mydiv对象找不到
为什么？

If Err.number>0 Then
ErrDesc = Err.description
Response.Write "<script language=javascript>"
Response.Write "var newwnd=window.open('error.htm','','width=400,height=300,nomenu');"
'Response.Write "newwnd.document.clear;"
'Response.Write "newwnd.document.write('<div id=mydiv></div>');"
Response.Write "newwnd.mydiv.innerHTML ='" & Errdesc & "';"
Response.Write "</script>"
'Response.Write "<form name=id1 Action=error.asp><input type=hidden name=hiderror value=" & ErrDesc & "></form>"
'Response.Write "<script language=javascript>window.id1.submit()</script>"
'Response.Redirect "error.asp?ErrDesc=" & ErrDesc
End IF