在JavaScript中，你可以使用date对象获取当前日期和时间;

var now = new Date();

这将获得本地客户端机器时间

jquery示例LINK

如果你正在使用jQuery DatePicker，你可以应用它在任何文本框，像这样:

$( "#datepicker" ).datepicker({dateFormat:"yy/mm/dd"}).datepicker("setDate",new Date());

你可以在javascript中添加一个扩展方法。

Date.prototype.today = function () {
    return ((this.getDate() < 10) ? "0" : "") + this.getDate() + "/" + (((this.getMonth() + 1) < 10) ? "0" : "") + (this.getMonth() + 1) + "/" + this.getFullYear();
}

function returnCurrentDate() {
                var twoDigitMonth = ((fullDate.getMonth().toString().length) == 1) ? '0' + (fullDate.getMonth() + 1) : (fullDate.getMonth() + 1);
                var twoDigitDate = ((fullDate.getDate().toString().length) == 1) ? '0' + (fullDate.getDate()) : (fullDate.getDate());
                var currentDate = twoDigitDate + "/" + twoDigitMonth + "/" + fullDate.getFullYear();
                return currentDate;
            }

当元素只有一个符号时，该对象设0:

function addZero(i) {
    if (i < 10) {
        i = "0" + i;
    }
    return i;
}

该对象设置实际的完整时间，小时和日期:

function getActualFullDate() {
    var d = new Date();
    var day = addZero(d.getDate());
    var month = addZero(d.getMonth()+1);
    var year = addZero(d.getFullYear());
    var h = addZero(d.getHours());
    var m = addZero(d.getMinutes());
    var s = addZero(d.getSeconds());
    return day + ". " + month + ". " + year + " (" + h + ":" + m + ")";
}

function getActualHour() {
    var d = new Date();
    var h = addZero(d.getHours());
    var m = addZero(d.getMinutes());
    var s = addZero(d.getSeconds());
    return h + ":" + m + ":" + s;
}

function getActualDate() {
    var d = new Date();
    var day = addZero(d.getDate());
    var month = addZero(d.getMonth()+1);
    var year = addZero(d.getFullYear());
    return day + ". " + month + ". " + year;
}

HTML:

<span id='full'>a</span>
<br>
<span id='hour'>b</span>
<br>    
<span id='date'>c</span>

JQUERY的观点:

$(document).ready(function(){
    $("#full").html(getActualFullDate());
    $("#hour").html(getActualHour());
    $("#date").html(getActualDate());
});

例子

我只是想分享一个我用皮埃尔的想法做的时间戳原型。没有足够的点来评论:(

// US common date timestamp
Date.prototype.timestamp = function() {
  var yyyy = this.getFullYear().toString();
  var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based
  var dd  = this.getDate().toString();
  var h = this.getHours().toString();
  var m = this.getMinutes().toString();
  var s = this.getSeconds().toString();

  return (mm[1]?mm:"0"+mm[0]) + "/" + (dd[1]?dd:"0"+dd[0]) + "/" + yyyy + " - " + ((h > 12) ? h-12 : h) + ":" + m + ":" + s;
};

d = new Date();

var timestamp = d.timestamp();
// 10/12/2013 - 2:04:19

console.log($.datepicker.formatDate('yy/mm/dd', new Date()));