Maybe my question might have been asked before but I am newbie. I have a Skybow list form. In my Default New Form
Let's say I have fields like A,B,C . These fields types are "Choice" and Checkbox. I have not set their "default values"
My users may click A field OR B field OR C at the same time. OR They may only click C field.
so What I want to put an action while only saving button that They have to click at least A or B or C. They must not save the form without choosing A or B or C (At least1 field has to be clicked)
How can I write this function and inform user with a warning message while click "Save" button