1 var addDate = { 2         //日期，在原有日期基础上，增加days天数，默认增加1天 3         setDate:function(date, days){ 4             if (days == undefined || days == ‘‘) { 5                 days = 1; 6             } 7             var date = new Date(date); 8             date.setDate(date.getDate() + days); 9             var month = date.getMonth() + 1;10             var day = date.getDate();11             return date.getFullYear() + ‘-‘ + this.getFormatDate(month) + ‘-‘ + this.getFormatDate(day);12         },13         //日期月份/天的显示，如果是1位数，则在前面加上‘0‘14         getFormatDate:function(arg){15             if (arg == undefined || arg == ‘‘) {16                 return ‘‘;17             }18             var re = arg + ‘‘;19             if (re.length < 2) {20                 re = ‘0‘ + re;21             }22             return re;23         }24     }