Set the webkit-keyframes from/to parameter with JavaScript

Question

Is there any way to set the from or to of a webkit-keyframe with JavaScript?

Answer 1

A solution of sorts:

var cssAnimation = document.createElement('style');
cssAnimation.type = 'text/css';
var rules = document.createTextNode('@-webkit-keyframes slider {'+
'from { left:100px; }'+
'80% { left:150px; }'+
'90% { left:160px; }'+
'to { left:150px; }'+
'}');
cssAnimation.appendChild(rules);
document.getElementsByTagName("head")[0].appendChild(cssAnimation);

Just adds a style definition to the header. Would be much cleaner/better to define it though the DOM if possible.

Edit: Error in Chrome with old method