code: public void setScrollY(String scrollY) {
          this.scrollY = scrollY;
          if (Empty.is(this.scrollY)) this.scrollYnum = 0;
          else {
              String s = StrUtils.getDigitsOnly(this.scrollY);
              if (!Empty.is(s)) this.scrollYnum = Integer.parseInt(s);
              else this.scrollYnum = 0;
          }
      }
docs: Max table's scrolling area vertical height, so actual table's height will be higher:
  header + scrolling area + footer.
  <br> Any CSS measurement is acceptable, or just a number which is treated as pixels.