Account Pop-up Alert

Hi there,

I was wondering (without programming) if there is a way to have a pop-up alert on an Account and/or Contact entity.

For example, we would like to put a field that shows the clients overdue balance. If there is any balance in the field, I'd like there to be a Warning message to users advising them of such. Also, if the balance field displays a value about $500, to not allow a user to proceed without manager intervention.

I'm guessing that OOTB could be limited for this functionality.

Thanks for your help

Trevor