I need to set a decision box to false but it does not seem to work.

Code im using is:

input.Change_Shipping = false;

Im thinking that maybe I can't change the value for an on click action?

This is a stateless form embeded in a Customer Portal html view. Im using this so clients can change their shipping address. After submit i want the decision box to uncheck causing a bunch of fields to disable again.

Maybe this is behaviour i cant achieve?