JS时间工具类

/*** 时间对象的格式化*/Date.prototype.format = function(format){/** format="yyyy-MM-dd hh:mm:ss";*/var o = {"M+" : this.getMonth() + 1,"d+" : this.getDate(),"h+" : this.getHours(),"m+" : this.getMinutes(),"s+" : this.getSeconds(),"q+" : Math.floor((this.getMonth() + 3) / 3),"S" : this.getMilliseconds()}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;}/** * 获取给定日期的最大天数 * yyyy-MM-dd  */Date.prototype.maxDay  = function(){var curDate = new Date(this.getFullYear(),this.getMonth(),1);var nextDate = new Date(this.getFullYear(),this.getMonth()+1,1);var days = (nextDate.getTime()-curDate.getTime())/(24*3600*1000);return days;}