js获取当前日期(年月日格式)

获取当前日期

    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;

    }

调用直接获取当天日期

获取当前日期时间

    //获取当前日期时间

    function curentTime()

    {

        var now = new Date();

        var year = now.getFullYear();       //年

        var month = now.getMonth() + 1;     //月

        var day = now.getDate();            //日

        var hh = now.getHours();            //时

        var mm = now.getMinutes();          //分

        var ss = now.getSeconds();          //分

        var clock = year + "-";

        if(month < 10)

            clock += "0";

        clock += month + "-";

        if(day < 10)

            clock += "0";

        clock += day + " ";

        if(hh < 10)

            clock += "0";

        clock += hh + ":";

        if (mm < 10)

            clock += '0';

        clock += mm + ":";

        if (ss < 10)

            clock += '0';

        clock += ss;

        return clock;

    }

    //定时执行setTime

    setInterval("setTime()",1000);

    //将id为currentTime的div更新为最新时间

    function setTime(){

        $('#currentTime').html(curentTime());

    }

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;

             }

        }

调用，参数为yyyy-MM.