how to send a var to trigger.

create table tbl_login
(
userid varchar(20),
pwd varchar(20)
)

create table emp
(
fname varchar(30)not null,
mname varchar(30) not null,
lname varchar(30) not null,
gender varchar(15)not null,
dept varchar(30) not null,
design varchar(50) not null,
salary money,
email varchar(30)not null,
DOB varchar(30)not null,
Address varchar(50)not null,
country varchar(50)not null,
tel_res varchar(16)not null,
tel_ext varchar(16)not null,
mobile varchar(12)not null,
userid varchar(20) primary key,
pwd varchar(20) not null
)

-------------trigger for emp and tbl_login (trg_insert_user)-------------------------
create trigger trg_insert_user
on emp
for insert
as
declare
@userid varchar(20),
@pwd varchar(20)
set @userid=(select userid from inserted)
set @pwd=(select pwd from inserted)

insert into tbl_login
values(@userid,@pwd)

as soon as emp record is added then user id and pwd will automatically save to tbl_login