get_from_from();
if(!$contribution_area_equation->save($equation)){
error_message("",$msg['save_error'], 0);
}
contribution_area_equation::show_list();
break;
case 'add':
$contribution_area_equation->add();
break;
case 'edit':
print $contribution_area_equation->do_form();
break;
case 'delete':
if(!contribution_area_equation::delete($id)){
$used=contribution_area_equation::check_used($id);
foreach($used as $auth){
$list.=$auth['link'].'
';
}
error_message("", $msg['contribution_area_equation_used'].'
'.$list);
}
contribution_area_equation::show_list();
break;
case 'build':
$contribution_area_equation->add();
break;
case 'form':
print $contribution_area_equation->do_form();
break;
default:
contribution_area_equation::show_list();
break;
}