function Thistime() { //当前日期
  var date = new Date();
  var year = date.getFullYear();
  var month = date.getMonth() + 1;
  var day = date.getDate();
  var mytime=date.toLocaleTimeString();     //获取当前时间
  // myDate.toLocaleString( );
  var time = year + "-" + month + "-" + day+' '+mytime;
  return time;
}

Date.prototype.isLeapYear 判断闰年
Date.prototype.Format 日期格式化
Date.prototype.DateAdd 日期计算
Date.prototype.DateDiff 比较日期差
Date.prototype.toString 日期转字符串
Date.prototype.toArray 日期分割为数组
Date.prototype.DatePart 取日期的部分信息
Date.prototype.MaxDayOfDate 取日期所在月的最大天数
Date.prototype.WeekNumOfYear 判断日期所在年的第几周
StringToDate 字符串转日期型
IsValidDate 验证日期有效性
CheckDateTime 完整日期时间检查
daysBetween 日期天数差

//--------------------------------------------------- 
// 判断闰年 
//--------------------------------------------------- 
Date.prototype.isLeapYear = function() {
  return (0 == this.getYear() % 4 && ((this.getYear() % 100 != 0) || (this.getYear() % 400 == 0)));
}
//--------------------------------------------------- 
// 日期格式化 
// 格式 YYYY/yyyy/YY/yy 表示年份 
// MM/M 月份 
// W/w 星期 
// dd/DD/d/D 日期 
// hh/HH/h/H 时间 
// mm/m 分钟 
// ss/SS/s/S 秒 
//--------------------------------------------------- 
Date.prototype.Format = function(formatStr) {
  var str = formatStr;
  var Week = ['日', '一', '二', '三', '四', '五', '六'];
  str = str.replace(/yyyy|YYYY/, this.getFullYear());
  str = str.replace(/yy|YY/, (this.getYear() % 100) > 9 ? (this.getYear() % 100).toString() : '0' + (this
  .getYear() % 100));
  str = str.replace(/MM/, this.getMonth() > 9 ? this.getMonth().toString() : '0' + this.getMonth());
  str = str.replace(/M/g, this.getMonth());
  str = str.replace(/w|W/g, Week[this.getDay()]);
  str = str.replace(/dd|DD/, this.getDate() > 9 ? this.getDate().toString() : '0' + this.getDate());
  str = str.replace(/d|D/g, this.getDate());
  str = str.replace(/hh|HH/, this.getHours() > 9 ? this.getHours().toString() : '0' + this.getHours());
  str = str.replace(/h|H/g, this.getHours());
  str = str.replace(/mm/, this.getMinutes() > 9 ? this.getMinutes().toString() : '0' + this.getMinutes());
  str = str.replace(/m/g, this.getMinutes());
  str = str.replace(/ss|SS/, this.getSeconds() > 9 ? this.getSeconds().toString() : '0' + this.getSeconds());
  str = str.replace(/s|S/g, this.getSeconds());
  return str;
}
//+--------------------------------------------------- 
//| 求两个时间的天数差 日期格式为 YYYY-MM-dd 
//+--------------------------------------------------- 
function daysBetween(DateOne, DateTwo) {
  var OneMonth = DateOne.substring(5, DateOne.lastIndexOf('-'));
  var OneDay = DateOne.substring(DateOne.length, DateOne.lastIndexOf('-') + 1);
  var OneYear = DateOne.substring(0, DateOne.indexOf('-'));
  var TwoMonth = DateTwo.substring(5, DateTwo.lastIndexOf('-'));
  var TwoDay = DateTwo.substring(DateTwo.length, DateTwo.lastIndexOf('-') + 1);
  var TwoYear = DateTwo.substring(0, DateTwo.indexOf('-'));
  var cha = ((Date.parse(OneMonth + '/' + OneDay + '/' + OneYear) - Date.parse(TwoMonth + '/' + TwoDay + '/' +
    TwoYear)) / 86400000);
  return Math.abs(cha);
}
//+--------------------------------------------------- 
//| 日期计算 
//+--------------------------------------------------- 
Date.prototype.DateAdd = function(strInterval, Number) {
  var dtTmp = this;
  switch (strInterval) {
    case 's':
      return new Date(Date.parse(dtTmp) + (1000 * Number));
    case 'n':
      return new Date(Date.parse(dtTmp) + (60000 * Number));
    case 'h':
      return new Date(Date.parse(dtTmp) + (3600000 * Number));
    case 'd':
      return new Date(Date.parse(dtTmp) + (86400000 * Number));
    case 'w':
      return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
    case 'q':
      return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number * 3, dtTmp.getDate(), dtTmp.getHours(),
        dtTmp.getMinutes(), dtTmp.getSeconds());
    case 'm':
      return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(),
        dtTmp.getMinutes(), dtTmp.getSeconds());
    case 'y':
      return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(),
        dtTmp.getMinutes(), dtTmp.getSeconds());
  }
}
//+--------------------------------------------------- 
//| 比较日期差 dtEnd 格式为日期型或者 有效日期格式字符串 
//+--------------------------------------------------- 
Date.prototype.DateDiff = function(strInterval, dtEnd) {
  var dtStart = this;
  if (typeof dtEnd == 'string') //如果是字符串转换为日期型 
  {
    dtEnd = StringToDate(dtEnd);
  }
  switch (strInterval) {
    case 's':
      return parseInt((dtEnd - dtStart) / 1000);
    case 'n':
      return parseInt((dtEnd - dtStart) / 60000);
    case 'h':
      return parseInt((dtEnd - dtStart) / 3600000);
    case 'd':
      return parseInt((dtEnd - dtStart) / 86400000);
    case 'w':
      return parseInt((dtEnd - dtStart) / (86400000 * 7));
    case 'm':
      return (dtEnd.getMonth() + 1) + ((dtEnd.getFullYear() - dtStart.getFullYear()) * 12) - (dtStart
        .getMonth() + 1);
    case 'y':
      return dtEnd.getFullYear() - dtStart.getFullYear();
  }
}
//+--------------------------------------------------- 
//| 日期输出字符串，重载了系统的toString方法 
//+--------------------------------------------------- 
Date.prototype.toString = function(showWeek) {
  var myDate = this;
  var str = myDate.toLocaleDateString();
  if (showWeek) {
    var Week = ['日', '一', '二', '三', '四', '五', '六'];
    str += ' 星期' + Week[myDate.getDay()];
  }
  return str;
}
//+--------------------------------------------------- 
//| 日期合法性验证 
//| 格式为：YYYY-MM-DD或YYYY/MM/DD 
//+--------------------------------------------------- 
function IsValidDate(DateStr) {
  var sDate = DateStr.replace(/(^\s+|\s+$)/g, ''); //去两边空格; 
  if (sDate == '') return true;
  //如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为'' 
  //数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式 
  var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g, '');
  if (s == '') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D 
  {
    var t = new Date(sDate.replace(/\-/g, '/'));
    var ar = sDate.split(/[-/:]/);
    if (ar[0] != t.getYear() || ar[1] != t.getMonth() + 1 || ar[2] != t.getDate()) {
      //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。'); 
      return false;
    }
  } else {
    //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。'); 
    return false;
  }
  return true;
}
//+--------------------------------------------------- 
//| 日期时间检查 
//| 格式为：YYYY-MM-DD HH:MM:SS 
//+--------------------------------------------------- 
function CheckDateTime(str) {
  var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/;
  var r = str.match(reg);
  if (r == null) return false;
  r[2] = r[2] - 1;
  var d = new Date(r[1], r[2], r[3], r[4], r[5], r[6]);
  if (d.getFullYear() != r[1]) return false;
  if (d.getMonth() != r[2]) return false;
  if (d.getDate() != r[3]) return false;
  if (d.getHours() != r[4]) return false;
  if (d.getMinutes() != r[5]) return false;
  if (d.getSeconds() != r[6]) return false;
  return true;
}
//+--------------------------------------------------- 
//| 把日期分割成数组 
//+--------------------------------------------------- 
Date.prototype.toArray = function() {
  var myDate = this;
  var myArray = Array();
  myArray[0] = myDate.getFullYear();
  myArray[1] = myDate.getMonth();
  myArray[2] = myDate.getDate();
  myArray[3] = myDate.getHours();
  myArray[4] = myDate.getMinutes();
  myArray[5] = myDate.getSeconds();
  return myArray;
}
//+--------------------------------------------------- 
//| 取得日期数据信息 
//| 参数 interval 表示数据类型 
//| y 年 m月 d日 w星期 ww周 h时 n分 s秒 
//+--------------------------------------------------- 
Date.prototype.DatePart = function(interval) {
  var myDate = this;
  var partStr = '';
  var Week = ['日', '一', '二', '三', '四', '五', '六'];
  switch (interval) {
    case 'y':
      partStr = myDate.getFullYear();
      break;
    case 'm':
      partStr = myDate.getMonth() + 1;
      break;
    case 'd':
      partStr = myDate.getDate();
      break;
    case 'w':
      partStr = Week[myDate.getDay()];
      break;
    case 'ww':
      partStr = myDate.WeekNumOfYear();
      break;
    case 'h':
      partStr = myDate.getHours();
      break;
    case 'n':
      partStr = myDate.getMinutes();
      break;
    case 's':
      partStr = myDate.getSeconds();
      break;
  }
  return partStr;
}
//+--------------------------------------------------- 
//| 取得当前日期所在月的最大天数 
//+--------------------------------------------------- 
Date.prototype.MaxDayOfDate = function() {
  var myDate = this;
  var ary = myDate.toArray();
  var date1 = (new Date(ary[0], ary[1] + 1, 1));
  var date2 = date1.dateAdd(1, 'm', 1);
  var result = dateDiff(date1.Format('yyyy-MM-dd'), date2.Format('yyyy-MM-dd'));
  return result;
}
//+--------------------------------------------------- 
//| 取得当前日期所在周是一年中的第几周 
//+--------------------------------------------------- 
Date.prototype.WeekNumOfYear = function() {
  var myDate = this;
  var ary = myDate.toArray();
  var year = ary[0];
  var month = ary[1] + 1;
  var day = ary[2];
  document.write('< script language=VBScript\> \n');
  document.write('myDate = DateValue('
    '+month+' - '+day+' - '+year+'
    ') \n');
  document.write('result = DatePart('
    ww ', myDate) \n');
  document.write(' \n');
  return result;
}
//+--------------------------------------------------- 
//| 字符串转成日期类型 
//| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd 
//+--------------------------------------------------- 
function StringToDate(DateStr) {
  var converted = Date.parse(DateStr);
  var myDate = new Date(converted);
  if (isNaN(myDate)) {
    //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-'; 
    var arys = DateStr.split('-');
    myDate = new Date(arys[0], --arys[1], arys[2]);
  }
  return myDate;
}