Pass A False Statement Out From A Function

if i group some javascript into a function that returns false; how could i carry that 'false' out of the function so it can be used outside the function.the example below shows the validate function checks for a condition then returns false if it is met. i want this false to then be passed out of the function to then throw an error in its containing function. (goal to prevent the submitting of a form)i dont want the proceed function to be called, so how can the other function prevent this.Now i realise that the validate function could be incorporated into the top level function but, my form will eventually be quite large with a multiplitude of fields so i need to know how i can call back to functions and use them as objects insteasd of repeating lots of code.