public function offset($id)
 {
     $loanaccount = Loanaccount::findOrFail($id);
     $principal_paid = Loanrepayment::getPrincipalPaid($loanaccount);
     $principal_due = $loanaccount->amount_disbursed - $principal_paid;
     $interest_due = Loanaccount::intBalOffset($loanaccount);
     return View::make('loanrepayments.offset', compact('loanaccount', 'principal_due', 'interest_due', 'principal_paid'));
 }