Updating jQuery timepicker minTime at runtime dynamically

Question

I am trying to update minTime of jquery time picker dynamically when I put meantime while page loading it works but when I do the same thing when user select start time it should update minTime of end time

here is my attempt to update minTime,

$('#datetimepicker5').timepicker({
timeFormat: 'HH:mm',
    change: tmTotalHrsOnSite
     //  minTime: '15:00'
});
$('#datetimepicker4').timepicker({
timeFormat: 'HH:mm',
    change: tmTotalHrsOnSite
     //  minTime: '15:00'
});


function tmTotalHrsOnSite () {

var picktime = jQuery('#datetimepicker4').val();

    alert(picktime);
jQuery('#datetimepicker5').timepicker({
      minTime: picktime
});
};

I am able to detect time on change and also getting inside the function but not being successful to update minTime to disable users to see the previous time.

Answer 1

The thing that worked for me is adding minTime option in onChange event, and passing time value in format specified in timePicker.

    $('.startTP').timepicker({
            timeFormat: 'hh:mm p',
            startTime: '07:00',
            interval: 5,
            dynamic: false,
            dropdown: true,
            scrollbar: true,
            change: function (time) {
                var time = $(this).val();
                var picker = $(".endTP");
                picker.timepicker('option', 'minTime', time);
            }
        });