js格式化时间日期源码实例

<script>
Date.prototype.format=function(format){
  var o={
    "M+" : this.getMonth()+1, //month
    "d+" : this.getDate(), //day
    "h+" : this.getHours(), //hour
    "m+" : this.getMinutes(), //minute
    "s+" : this.getSeconds(), //second
    "q+" : Math.floor((this.getMonth()+3)/3), //quarter
    "S" : this.getMilliseconds() //millisecond
  };
  if(/(y+)/.test(format)) 
  {    
    format=format.replace(RegExp.$1,(this.getFullYear()+"").substr(4- RegExp.$1.length));
  }
  for(var k in o)
  {
    if(new RegExp("("+ k +")").test(format))
    {
     format=format.replace(RegExp.$1,RegExp.$1.length==1?o[k]:("00"+o[k]).substr((""+o[k]).length));
    }
  }
  return format;
};
var dt=new Date();
var nowDate=dt.format("yyyy-MM-dd hh:mm:ss");
console.log(nowDate)
</script>