有个sql的程序不太明白
<%
if not Request.ServerVariables("REMOTE_ADDR")=request.cookies("IPAddress") then
response.cookies("IPAddress")=Request.ServerVariables("REMOTE_ADDR")
%>
<!--#include file="dbconn.asp"-->
<%
dim rs
dim sql
dim selected
selected=request.form("options")
set rs=server.createobject("adodb.recordset")
sql="update research set select"&selected&"=select"&selected&"+1 where id=1"
rs.open sql,conn,3,3
set rs=nothing
conn.close
set conn=nothing
response.redirect "result.asp"
else
Response.write "您已经投了票，谢谢您的支持！"
end if
%>
红色加粗的那一句是什么意思，麻烦详细解释一下，谢谢！！
