function a7_ignore(group1,group2,group3)
{
  ENTITY* e;
  for(e = ent_next(NULL); e; e=ent_next(e)) {
    if(e->group == group1 || e->group == group2 || e->group == group3) 
      e->flags |= FLAG2;
    else
      e->flags &= ~FLAG2;
  }
}