Prevent SUBMIT

Hello, Possible to disable the SUBMIT button if an equation field on an add form is not equal to ZERO? I tried to do this within the app but the values don't technically "exist" at the time you hit SUBMIT so it won't work with any of the rules that I can find. 

I don't have much experience with coding but I understand this may be a solution to this problem.


Thank you all

Since you're dealing with an equation, I think you will have to use some code. To start, I would suggest taking a look at the custom form validation example code from the Developer Docs.