Implementing Insert Function

Question

I am currently working through Khan Academy\'s algorithm course, which uses JS to teach fundamental algorithms. I am currently in the process of implementing an insertion so

Answer 1

This has worked:

var insert = function(array, rightIndex, value) {

var j = rightIndex;

for(var j = rightIndex; j >= 0 && array[j] > value; j--) {
    array[j + 1] = array[j];
}   
array[j + 1] = value;