//js格式化属性
 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;
 };