Change the datetime format of the calender control to mm/dd/yyy hh:mm

Change the datetime format of the calender control to mm/dd/yyy hh:mm

I want to change the datetime format for the datetime picker control from yyyy/mm/dd hh:mm to mm/dd/yyyy hh:mm

here is what i am doing

script>
        $.datetimepicker.setLocale('en-us'); 
        var ct = $$("tbStartTime").attr("id");
        ct = '#' + ct;
        $(ct).datetimepicker({
            dayOfWeekStart: 1,
            lang: 'en-us',
            formatDate: 'MM.dd.yyyy hh:mm'
        });
        $(ct).datetimepicker({ value: '', step: 10 });


        var ct1 = $$("tbEndTime").attr("id");
        ct1 = '#' + ct1;
        $(ct1).datetimepicker({
            dayOfWeekStart: 1,
            lang: 'en-us',
            formatDate: 'MM.dd.yyyy hh:mm'           
        });
        $(ct1).datetimepicker({ value: '', step: 10 }); 
    </script>

but its not working, any ideas how to do that.