Read array to call function

1

besides the fact that this does not work, how else would you go about doing something like this the most efficient way?
thanks-

1)using the number keypad, the user pushes a series of numbers to an array.
2)lookup() is called to identify which “code” has been entered.


myArray:Array= new Array(1,2,3,4);
lookup();

function lookup()
{
    switch (myArray)
    {
        case (1,2,3) :
            //do stuff
            break;

        case (1,2,3,4) :
            //do stuff
            break;

        default :
            break;
    }
}