Check out the WebFont.load command in this github repo:
https://github.com/typekit/webfontloader
You can load whatever font you want dynamically:
<script src="http://ajax.googleapis.com/ajax/libs/webfont/1/webfont.js"></script>
<script>
WebFont.load({
google: {
families: ['Droid Sans', 'Droid Serif']
}
});
</script>