JavaScript - Declaring Global Scope for Nested Function?

Question

My attempts at giving global scope to a nested JavaScript function are not working:

//DECLARE FUNCTION B IN GLOBAL SCOPE
function B;

function A() {

    //DEFIN         


        

Answer 1

What about:

function A() {
    window.B = function() {
        alert("function B is running");
    }
}
//CALL FUNCTION B FROM GLOBAL SCOPE
B();