<%
id=trim(request("id"))
sql="select userid from usertable where userid='"&id&"'"
set rs=conn.execute(sql) 'conn 为数据库连接,这里就不详细写了
if not rs.eof then
response.write "此帐号已经被人注册,请您重新注册新帐号!"
end if
%>
username=trim(request("username"))
sql="select * from users where username= '"&username&"'"
rs.open sql,conn,1,3
if rs.eof or rs.bof then
用户名或密码出错!
......