createMonthNav = function( next ) {

            // Otherwise, return the created month tag.
            return _.node(
                'div',
                ' ',
                settings.klass[ 'nav' + ( next ? 'Next' : 'Prev' ) ] + (

                    // If the focused month is outside the range, disabled the button.
                    ( next && viewsetObject.year >= maxLimitObject.year && viewsetObject.month >= maxLimitObject.month ) ||
                    ( !next && viewsetObject.year <= minLimitObject.year && viewsetObject.month <= minLimitObject.month ) ?
                    ' ' + settings.klass.navDisabled : ''
                ),
                'data-nav=' + ( next || -1 ) + ' ' +
                _.ariaAttr({
                    role: 'button',
                    controls: calendar.$node[0].id + '_table'
                }) + ' ' +
                'title="' + (next ? settings.labelMonthNext : settings.labelMonthPrev ) + '"'
            ) //endreturn
        }
Create a string for the nodes in the picker.