function checkdate(startdate, enddate, num, flag) { if(startdate == null || enddate == null) { popwin.info('提示','日期不可为空'); return false; } if(startdate == '' || enddate == '') { popwin.info('提示','请输入查询日期'); return false; } var start_date = startdate + 00:00; var end_date = enddate + 00:00; start_date = new date(start_date.replace(/-/g, /)); end_date = new date(end_date.replace(/-/g, /)); if(start_date > end_date){ popwin.info('提示','截止日期不能小于起始日期'); return false; } // 获取num天以后的日期 var currentdate = new date(); currentdate.setdate(currentdate.getdate() + num); if(end_date > currentdate) { popwin.info('提示','截止日期不能大于' + num + '天之后的日期'); return false; } // 判断是否跨月查询 if(flag == false) { if(start_date.getmonth() != end_date.getmonth()) { popwin.info('提示','该查询不支持跨月查询'); return false; } } }