Fiunction find difference betwen two dates

 function calcDiff(date1, date2) {
            //Get 1 day in milliseconds
            var one_day = 1000 * 60 * 60 * 24;

            // Convert both dates to milliseconds
            var date1_ms = date1.getTime();
            var date2_ms = date2.getTime();

            // Calculate the difference in milliseconds
            var difference_ms = date2_ms - date1_ms;
            //take out milliseconds
            difference_ms = difference_ms / 1000;
            var seconds = Math.floor(difference_ms % 60);
            difference_ms = difference_ms / 60;
            var minutes = Math.floor(difference_ms % 60);
            difference_ms = difference_ms / 60;
            var hours = Math.floor(difference_ms % 24);
            var days = Math.floor(difference_ms / 24);

            return minutes + ' minutes, and ' + seconds + ' seconds';
        };