How can I control the animation speed of a sprite using create JS?

When you press right and left, the sprite will run through the frames... I'd like to leave the fps at 60, but alter how fast the frames are looped through without altering the main game FPS rate.

[See a demo here.](http://www.hittingtreeswithsticks.com/Chinese%20Adventure/Chinese%20Adventure.html) Press right and left arrow to see.

I thought changing the bmp animation frequency property would do the trick...

`bmpAnimation.frequency = 2;` 

But it did not work...

Or should I be using the [jQuery animation](http://addyosmani.com/blog/jquery-sprite-animation/)? 

**Also**, I noticed that each time I hit a random key, the animation plays 1 frame then goes back to first frame. Why is that?

Thanks!