To use the Web Font Loader library, just include it in your page and tell it which fonts to load. For example, you could load fonts from Google Fonts using the Web Font Loader hosted on Google Hosted Libraries using the following code.

<script src="//ajax.googleapis.com/ajax/libs/webfont/1.4.7/webfont.js"></script>

<script>

WebFont.load({

google: {

families: ['Droid Sans', 'Droid Serif']

}

});

</script>