pageoffseting on chapter basis!

[fadiz99]

here is the scenario:
page : 1 2 3 4 I II 5 6 III IV 7

I'll use page@navbarnumber to set Romain numbers

problem: when i search page 5 in tooltip ill go to page I, pageoffset wont help here

so i think if i can pageoffset on chapter basis the solution would be

Code: [Select]

<chapter pageoffset='-2'>
  <page navbarnumber='I'>
  </page>
  <page navbarnumber='II'>
  </page>
</chapter>

is there any implementation for this !!