$('<button type="button" class="btn-floating btn-flat clockpicker-button pm-button" tabindex="2">' + 'PM' + '</button>').on('click', function () {
          self.amOrPm = 'PM';
          self.amPmBlock.children('.am-button').removeClass('active');
          self.amPmBlock.children('.pm-button').addClass('active');
          self.spanAmPm.empty().append('PM');