Js获取当前日期时间及格式化代码

var myDate = new Date();myDate.getYear();    //获取当前年份(2位)myDate.getFullYear();  //获取完整的年份(4位,1970-????)myDate.getMonth();    //获取当前月份(0-11,0代表1月)myDate.getDate();    //获取当前日(1-31)myDate.getDay();     //获取当前星期X(0-6,0代表星期天)myDate.getTime();    //获取当前时间(从1970.1.1开始的毫秒数)myDate.getHours();    //获取当前小时数(0-23)myDate.getMinutes();   //获取当前分钟数(0-59)myDate.getSeconds();   //获取当前秒数(0-59)myDate.getMilliseconds();  //获取当前毫秒数(0-999)myDate.toLocaleDateString();   //获取当前日期var mytime=myDate.toLocaleTimeString();   //获取当前时间myDate.toLocaleString( );    //获取日期与时间

//--------------------------------------------------- // 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 = Datue(''+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; } 

 //本地时钟function clockon() {  var now = new Date();  var year = now.getFullYear(); //getFullYear getYear  var month = now.getMonth();  var date = now.getDate();  var day = now.getDay();  var hour = now.getHours();  var minu = now.getMinutes();  var sec = now.getSeconds();  var week;  month = month + 1;  if (month < 10) month = "0" + month;  if (date < 10) date = "0" + date;  if (hour < 10) hour = "0" + hour;  if (minu < 10) minu = "0" + minu;  if (sec < 10) sec = "0" + sec;  var arr_week = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");  week = arr_week[day];  var time = "";  time = year + "年" + month + "月" + date + "日" + " " + hour + ":" + minu + ":" + sec + " " + week;   $("#bgclock").html(time);   var timer = setTimeout("clockon()", 200);}