Timeline Keyframe scaling using JavaScript and HTML5

Hi All !

Is there a way to dynamically add and remove keyframes on the timeline accross all layers using Javascript in order to automate timeline scaling to match new timings ?

The scenario:

-  200 frame scene in sync with English audio.

( We have created paragraph breaks that align with certain frames, M1 at 20 frames,  M2 at 60 frames and M3 at 120 frames )

- Translate into Armenian

- Scene needs to be increased by 100 frames to sync with audio total length.

- M1 still aligns, but, M2 and M3 do not. ( Visuals no longer match audio )

- Use JavaScript to automatically add 50 frames at M2 and M3. ( Visuals now match Audio)

Is something like this possible ?

Regards