Return correctly formatted date

gistfile1.js

getFormattedDate('1/1/2013 12:30:00');

var result;

function getFormattedDate(input) {
    var pattern = /(.*?)\/(.*?)\/(.*?)$/;
    result = input.replace(pattern, function (match, p1, p2, p3) {
        var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Dec'];
        return (p2 < 10 ? "0" + p2 : p2) + " " + months[(p1 - 1)] + " " + p3;
    });
}
alert(result);