Atlas substitute for AutoPostBack?

[bigbrorpi]

I'm trying to set up two things...

1. A textbox that, when you tab out of it or press Enter populates
another textbox.
2. A textbox whose value is calculated based on a function in dataset
that involves database calculations in combination with values from
other textboxes on the page.

1. works with autopostback set to true, but this is an extra round
trip, and causes some issues with controls on my page that seem to be
adverse to postbacks (MetaBuilders Combobox). Can this be done with
ATLAS somehow?

2. Is this something ATLAS would help with?

Thanks!