code: def set_link(self, link,y=0,page=-1):
          "Set destination of internal link"
          if(y==-1):
              y=self.y
          if(page==-1):
              page=self.page
          self.links[link]=[page,yf set_link(self, link,y=0,page=-1):
          "Set destination of internal link"
          if(y==-1):
              y=self.y
          if(page==-1):
              page=self.page
          self.links[link]=[page,y]
docs: Set destination of internal link