Copying A Field Automatically From Another Field

Hi

Forgive me - but i am new to db.

I have an employee field in my purchase orders from and when I do stock transactions - i have an employee field against each item in the purchase order. I would like to just copy the employee field from the purchase order form automatically next to each product listed instead of having to keep typing the same thing.

the reason i am doing this is because when people come to take stock out - i would like to see there name against each item in the products from so people can not not take more than they ordered.

thanks in advance.