code: public final Page setBase(String target, String href)
      {
          base="<base " +
              ((target!=null)?("TARGET=\""+target+"\""):"") +
              ((href!=null)?("HREF=\""+href+"\""):"") +
              ">";
          return this;
      }
docs: Set the URL Base for the Page.
  @param target Default link target, null if none.
  @param href Default absolute href, null if none.
  @return This Page (for chained commands)