小学生怎样减少汗毛:asp接收表单数据时为什么在数据前面有个逗号？

if Request.ServerVariables("Request_Method")="POST" then
dim title,introduce,contents,No
No=""
title=trim(Request.form("title"))
contents = Request.form("contents")
contents = Replace(contents,Chr(32)," ")
contents = Replace(contents,vbcrlf,"<br>")
If Request.form("introduce")="" then
introduce=InterceptString(contents,390)
introduce = introduce + "……"
else
introduce=Rtrim(Request.form("introduce"))
End if
dim count,ncontents
ncontents=""
count=len(contents)
for i=1 to count
ncontents = ncontents + Mid(contents,i,1) + "##"
next
ncontents=title+"<br><br>"+ncontents
set conn=server.createobject("adodb.connection")
conn.open"provider=microsoft.jet.oledb.4.0;data source="&server.mappath("hsxshasp.mdb")
set rs=server.createobject("adodb.recordset")
sql="select * from hnovels"
rs.open sql,conn,1,3
rs.addnew
rs("title")=title
rs("introduce")=introduce
rs("author")=session("user")
rs.update
No=rs("number")
rs.close
set rs=nothing
set conn=nothing
set objFSO=server.createobject("scripting.filesystemobject")
ph=server.mappath("ziyuan\"&No&".txt")
set fp=objFSO.createtextfile(ph)
fp.write ncontents
fp.close
set fp=nothing
set objFSO=nothing
response.write "<p align=center>添加小说成功，<a href=read.asp?id="&No&">查看</a>    <a href='index.asp'>返回首页</a></p>"
response.end
……
为什么添加小说时，得出的文件开头会有个逗号（，）的呢？