ie-inject-style-rules.js

// this is how I fixed IE crashing on
// dynamic injections of AtRules inside
// stylesheets (for example @font-face)

function setStyle(rules) {
  var d = document,
      s = d.createElement('style'),
      h = d.getElementsByTagName('head')[0] || d.documentElement;
  s.type = 'text/css';
  d.createElement('div').appendChild(s).styleSheet.cssText = rules;
  h.insertBefore(s, h.firstChild);
}