javascript read file from url

1// read text from URL location
2function getText(){
3    var request = new XMLHttpRequest();
4    request.open('GET', 'http://www.xxxxx.com/pocket.txt', true);
5    request.send(null);
6    request.onreadystatechange = function () {
7        if (request.readyState === 4 && request.status === 200) {
8            var type = request.getResponseHeader('Content-Type');
9            if (type.indexOf("text") !== 1) {
10                return request.responseText;
11            }
12        }
13    }
14}