Need Help with Javascript in HTML5

[sees_all1]

Writing a HTML5 / Javascript application, where I need to change the source of a VIDEO element. Is there a way to change both the video's source and alternate in Javascript?

 

Darn Mozilla for not supporting MP4... <_<

[sees_all1]

I ended up using this code.

 

var myVideo = document.createElement('video');
myVideo.id='vid1';

var source = document.createElement('source');
source.type = 'video/mp4';
source.src = 'someRandomVideo.mp4';
myVideo.appendChild(source);

source = document.createElement('source');
source.type = 'video/ogg';
source.src = 'sameRandomVideo.ogg';
myVideo.appendChild(source);