function getNowFormatDate() {        var date = new Date();        var seperator1 = "-";        var year = date.getFullYear();        var month = date.getMonth() + 1;        var strDate = date.getDate();        if (month >= 1 && month <= 9) {            month = "0" + month;        }        if (strDate >= 0 && strDate <= 9) {            strDate = "0" + strDate;        }        var currentdate = year + seperator1 + month + seperator1 + strDate;        return currentdate;    }

根据年月获取当月第一天和最后一天

//根据年月获取当月第一天日期        function getStartDate(yearmonthstr){            if(/^\d{4}-\d{2}$/.test(yearmonthstr)){ //判断是否满足yyyy-mm条件                var year = /\d{4}/.exec(yearmonthstr)[0];   //获取年份                var month = /\d{2}$/.exec(yearmonthstr)[0];  //获取月份                var d = new Date(year, month, 0);                 var day = d.getDate();  //获取月的天数                 return yearmonthstr+'-01';             }        }        //根据年月获取当月最后一天日期        function getEndDate(yearmonthstr){            if(/^\d{4}-\d{2}$/.test(yearmonthstr)){ //判断是否满足yyyy-mm条件                var year = /\d{4}/.exec(yearmonthstr)[0];  //获取年份                var month = /\d{2}$/.exec(yearmonthstr)[0];  //获取月份                var d = new Date(year, month, 0);                 var day = d.getDate();  //获取月的天数                 return yearmonthstr+'-'+day;             }        }