Format a JS Date Object according toa given String

formatDateObject.js

/* *****************************************************************************
 * Formates a JS Date Object according toa given String. The Place holders
 * work like the php date() function, but not every case is implemented !
 *
 *  %d%  Day of the month, 2 digits with leading zeros
 *  %j%  Day of the month without leading zeros
 *  %m%  Numeric representation of a month, with leading zeros
 *  %n%  Numeric representation of a month, without leading zeros
 *  %Y%  A full numeric representation of a year, 4 digits
 *  %y%  A two digit representation of a year
 *  %G%  24-hour format of an hour without leading zeros
 *  %H%  24-hour format of an hour with leading zeros
 *  %i%  Minutes with leading zeros
 *  %s%  Seconds, with leading zeros
 * ************************************************************************** */
var formatDateObject = function (dateObject, formatString) {
    "use strict";

    var j = String(dateObject.getDate()),
        d = String((j.length===1) ? "0"+j : j),
        n = String(dateObject.getMonth()+1),
        m = String((n.length===1) ? "0"+n : n),
        y = String(dateObject.getYear()).substr(-2, 2),
        Y = String(dateObject.getFullYear()),
        G = String(dateObject.getHours()),
        H = String((G.length===1) ? "0"+G : G),
        i = String(dateObject.getMinutes()),
        s = String(dateObject.getSeconds());

    return formatString.replace('%j%', j)
        .replace(/%d%/g, d)
        .replace(/%n%/g, n)
        .replace(/%m%/g, m)
        .replace(/%y%/g, y)
        .replace(/%Y%/g, Y)
        .replace(/%G%/g, G)
        .replace(/%H%/g, H)
        .replace(/%i%/g, i)
        .replace(/%s%/g, s);
};