gistfile1.txt

var lookUpISBN = function(isbn, callback) {
 var results = {...}
 callback(results);
}

(function() {
 var displaySearchResults = function(results, $container) {
   $container.text(results);
 };

 lookUpISBN('123456', function (results) {
   displaySearchResults(results, $('.someContainer'));
 });
})();