js 扩展jquery date 转换时间为UTC时间

Date.prototype.format = function (format) {
    var o = {
        "M+": this.getMonth() + 1, //month
        "d+": this.getDate(), //day
        "h+": this.getHours(), //hour
        "m+": this.getMinutes(), //minute
        "s+": this.getSeconds(), //second
        "q+": Math.floor((this.getMonth() + 3) / 3), //quarter
        "S": this.getMilliseconds() //millisecond
    }
    if (/(y+)/.test(format)) format = format.replace(RegExp.$1,
    (this.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;
}

//UTC时间转换
function GetTimeByTimeStr(dateStr) {
    var timeArr = dateStr.split("T");
    var d = timeArr[0].split("-");
    var t = timeArr[1].split(":");
    //先解析为UTC
    return new Date(Date.UTC(d[0], (d[1] - 1), d[2], t[0], t[1], t[2]));
}