Auto Populate textbox on selecting a value from dropdown box

[hkshad]

how do i Auto Populate textbox on selecting a value from dropdown box?

for eg:
Dropdown box selected name of computer model: Dell Optileplex 3020
Text box box must display computer brand name: Dell

[Webmaster]

Use Auto-Fill, see Field Setup in the help file.

[hkshad]

Thanks lot