JSHelper时间格式化

Helper.prototype.FormatDate = function (format) {
    var _now = new Date();
    var o = {
        "M+": _now.getMonth() + 1, //month
        "d+": _now.getDate(), //day
        "h+": _now.getHours(), //hour
        "m+": _now.getMinutes(), //minute
        "s+": _now.getSeconds(), //second
        "q+": Math.floor((_now.getMonth() + 3) / 3), //quarter
        "S": _now.getMilliseconds() //millisecond
    }

    if (/(y+)/.test(format)) {
        format = format.replace(RegExp.$1, (_now.getFullYear() + "").substr(4 - RegExp.$1.length));
    }

    for (var k in o) {
        if (new RegExp("(" + k + ")").test(format)) {
            format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
        }
    }
    return format;
}