next = function() {
            var script = document.createElement('script');
            script.src = prefix + cdb.files[c];
            document.body.appendChild(script);
            ++c;
            if(c == cdb.files.length) {
                if(ready) {
                    script.onload = ready;
                }
            } else {
                script.onload = next;
            }
        }
load all the javascript files. For testing, do not use in production