请ASP高手把判断用户名已经被注册的代码写出来,最好简单一点,谢谢!_百...答:response.write"alert('用户已存在!');history.go(-1)"else sql="insert into user(username,pwd1,pwd2,qq,address) values(" & username & "," & pwd1 & "," & pwd2 & "," & qq & "," & address & ")"conn.execute sql Response.Write("alert('注册成功')")end if end ...