STEP 1 - Create a function called createArray() that declares an array and then put a name into each element of the array.
STEP 2 - Create another function called getArrayLength(p_array) that has one parameter (the parameter is supposed to be an array object)
and return the length of the array parameter
STEP 3 - In createArray(), declare a variable and initialize it to the value returned from passing the array into getArrayLength();
STEP 4 - Still in createArray(), use innerHTML to fill "arrayDiv" with a string that displays the length of the array