javascript Date format(js日期格式化)

 1 Date.prototype.format = function (format) {   
 2                 if (!format) {
 3                     format = "yyyy-MM-dd hh:mm:ss";
 4                 }                       //如果不是这个格式强制转换
 5                 var o = {
 6                     "M+": this.getMonth() + 1, 
 7                     "d+": this.getDate(),
 8                     "h+": this.getHours(),
 9                     "m+": this.getMinutes(),
10                     "s+": this.getSeconds(),
11                     "q+": Math.floor((this.getMonth() + 3) / 3),
12                     "S": this.getMilliseconds()
13 
14                 };
15                 if (/(y+)/.test(format)) {
16                     format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
17                 }
18                 for (var k in o) {
19                     if (new RegExp("(" + k + ")").test(format)) {
20                         format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
21                     }
22                 }
23                 return format;
24             };




调用方法：

var time1 = new Date().format("yyyy-MM-dd HH:mm:ss");     
  
var time2 = new Date().format("yyyy-MM-dd");