asic paging logic to demo the buttons
			var pr = document.querySelector( '.paginate.left' );
			var pl = document.querySelector( '.paginate.right' );

			pr.onclick = slide.bind( this, -1 );
			pl.onclick = slide.bind( this, 1 );

			var index = 0, total = 5;

			function slide(offset) {
			  index = Math.min( Math.max( index + offset, 0 ), total - 1 );

			  document.querySelector( '.counter' ).innerHTML = ( index + 1 ) + ' / ' + total;

			  pr.setAttribute( 'data-state', index === 0 ? 'disabled' : '' );