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 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;

            alert(clock);