请好心的高手帮我看看这个代码里不对

代码:

<%if Request.QueryString("mod")="yes" then
user=Request("user")
dz=Request("dz")
tel=Request("tel")
zjh=Request("zjh")
jdrq=Request("jdrq")
gz=Request("gz")
th=Request("th")
sz=Request("sz")
xsj=Request("xsj")
jz=Request("jz")
Remarks=Request("Remarks")
tx=Request("tx")
If dz="" or tel="" or zjh="" or jdrq="" or th="" Then
response.write"<SCRIPT language=JavaScript>alert('请按照规定修改您的信息！');" 
response.write"javascript:history.go(-1)</SCRIPT>" 
response.end
end if
If gz="请选择工种" Then
response.write"<SCRIPT language=JavaScript>alert('请选择工种！');" 
response.write"javascript:history.go(-1)</SCRIPT>" 
response.end
end if

Set rs = Server.CreateObject("ADODB.Recordset")
sql="select * from [jy_lp] where id="&request("id")
rs.open sql,conn,1,3
rs("user")=user
rs("dz")=dz
rs("tel")=tel
rs("zjh")=zjh
rs("jdrq")=jdrq
rs("gz")=gz
rs("th")=th
rs("sz")=sz
rs("xsj")=xsj
rs("jz")=jz
rs("Remarks")=Remarks
rs("tx")=tx
rs.update
rs.close
response.redirect "login.asp"
end if%>