search help

Hi all,

I have 2 select options.i want to get the f4 help for the second select option based on the entry of first select option.

ex: first select option is <b>customer number</b>

and second is <b>purchase order no</b>.

if enter some value in customer select option .

based on this i need to get f4 search for the purchase orders.

thanks in advance

kiran