stylesheet-injector.js

(function() {
    var css = [
        '/css/default.css',
        '/css/section.css',
        '/css/custom.css'
    ],
    i = 0,
    link = document.createElement('link'),
    head = document.getElementsByTagName('head')[0],
    tmp;
    link.rel = 'stylesheet';

    for(; i < css.length; i++){
        tmp = link.cloneNode(true);
        tmp.href = css[i];
        head.appendChild(tmp);
    }
})();