Setting allowBlank Dynamically on Forms

[paulkissick]

It is possible to set an allowBlank property on fields, depending on the selection from another?

e.g.

I've got a combobox with a listener for the select event, and I want this listener function to make another field to be either required or not, before the form is submitted. I'm using the isValid() method to alert the user to fill out all fields.

Any help or suggestions would be welcome.

Also, would it be possible to set fields to being required (allowBlank) when the form is shown/created?

Many Thanks, Paul

[mjlecomte]

http://extjs.com/learn/Ext_FAQ_Forms...nk_dynamically

[paulkissick]

Oops, should maybe have checked the FAQ. Thanks.