function import(url) {
	var ext = url.match(/\.([a-z]+)$/)[1];

	if (ext === 'js') {
		var s = document.createElement('script');
		s.setAttribute('src', url);
		document.body.appendChild(s);
	} else if (ext === 'css') {
		var s = document.createElement('link');
		s.setAttribute('rel', 'stylesheet');
		s.setAttribute('href', url);
		document.body.appendChild(s);
	} else {
		throw new TypeError('Can\'t import file with extension ' + '. Only CSS and JavaScript files can be imported.');
	}
}