code: function (id_base) {
          var p     = this.paginator,
              c     = p.get('nextPageLinkClass'),
              label = p.get('nextPageLinkLabel'),
              last  = p.getTotalPages();
  
          this.link     = document.createElement('a');
          this.span     = document.createElement('span');
  
          this.link.id        = id_base + '-next-link';
          this.link.href      = '#';
          this.link.className = c;
          this.link.innerHTML = label;
          YAHOO.util.Event.on(this.link,'click',this.onClick,this,true);
  
          this.span.id        = id_base + '-next-span';
          this.span.className = c;
          this.span.innerHTML = label;
  
          this.current = p.getCurrentPage() === last ? this.span : this.link;
  
          return this.current;
      }
docs: Generate the nodes and return the appropriate node given the current
  pagination state.
  @method render
  @param id_base {string} used to create unique ids for generated nodes
  @return {HTMLElement}