import.js

function loadLibrary(url) {
        script = document.createElement('script');
        script.setAttribute('type', 'text/javascript');
        script.setAttribute('src', url);
        document.head.appendChild(script);
}

function loadLibraryByName(name) {
        switch(name) {
                case 'underscope':
                        loadLibrary('http://underscorejs.org/underscore-min.js');
                        break;
                case 'backbone':
                        if (!_)
                                loadLibrary('http://underscorejs.org/underscore-min.js');
                        loadLibrary('http://backbonejs.org/backbone-min.js');
                        break;
                case 'jquery':
                        loadLibrary('http://code.jquery.com/jquery-1.9.1.min.js');
                        break;
        }
}