Pop up required at time of delivery for advance amount in customer ledger.

Hi,

My client has requirement that whenever he goes on delivery screen for creating delivery, he needs a pop up on the screen that how much amount is lying as advance in that customer ledger.

So please let me know if there is any standard setting or we need to do some customizing through ABAP.

Please help

Edited by: Deepak Agrawal on Jan 7, 2012 1:20 PM