forAsync

Usage:

Upward Loop Function

up( 0, 10, 1, function(i) {
    // Do something
}, function() {
    // callback
});

Downward Loop Function

down( 10, 1, 2, function(i) {
    // Do something
}, function() {
    // callback
});

forEach Loop Function

forEach( Array, function(k, v) {
    // Do something
}, function() {
    // callback
});