Write to CRM footer with JavaScript

Question

I've noticed that when a mandatory field is not completed and a user attempts to save it adds a message to the form footer

Is it possible to do the same with JavaScript? For example, if I have a custom validation logic that fails (e.g. Start Date must occur within 6 months), is it possible and how would I add a validation message in the same location?

Answer 1

Business rule can help. But you may need one more calculated field to achieve your need.

Answer 2

This (MSDN link) is the supported way of displaying custom notifications, similar to the ones that come up for required fields.

The linked MSDN is too long to copy-paste here, essentially we're looking at these functions:

Xrm.Page.getControl(arg).setNotification
Xrm.Page.getControl(arg).addNotification
Xrm.Page.getControl(arg).clearNotification