方法1：

Date.prototype.Format = function (fmt) {      var o = {        "M+": this.getMonth() + 1, //月份         "d+": this.getDate(), //日         "h+": this.getHours()%12==0?12:this.getHours()%12, //小时         "H+": this.getHours(),        "m+": this.getMinutes(), //分         "s+": this.getSeconds(), //秒         "q+": Math.floor((this.getMonth() + 3) / 3), //季度         "f": this.getMilliseconds() //毫秒     };    if (/(y+)/.test(fmt))     fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));    for (var k in o)    if (new RegExp("(" + k + ")").test(fmt))         fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));    return fmt;}

var time1 = new Date().Format("yyyy-MM-dd");var time2 = new Date().Format("yyyy-MM-dd hh:mm:ss");  var time3 = new Date().Format("yyyy-MM-dd hh:mm:ss:f"); var time4=new Date().toLocaleString(); console.log(time1);console.log(time2);console.log(time3);console.log(time4);

方法2：

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));       //    this.setMonth(this.getMonth()+1);    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());         str=str.replace(/f/,this.getMilliseconds());      return str;   }

跟上面的一样调用

但是小时没有12小时制的了

 

http://www.cnblogs.com/zhangpengshou/archive/2012/07/19/2599053.html