//格式化日期：yyyy-MM-dd

    function formatDate(date) {

        var myyear = date.getFullYear();

        var mymonth = date.getMonth() + 1;

        var myweekday = date.getDate();

        if (mymonth < 10) {

            mymonth = "0" + mymonth;

        }

        if (myweekday < 10) {

            myweekday = "0" + myweekday;

        }

        return (myyear + "-" + mymonth + "-" + myweekday);

    }

    var date = new Date();

    var dateStr=formatDate(date);