can anybody tell me why these statement doesn't work? i'm getting mad

2. if ($(this).is ('.active, .colore') && $(this).parent().is('.selectedLava')) {
3. 
   
4. $('#navigazione ul.nav_secondolivello:visible').fadeOut(0, 
5.       function (){
6.       $(attivataA+'_sez').fadeIn(400)}
7.       );
8. }

and not even in this way

2. var attivataA = $(this).attr('href');
4. var paragone = $('#navigazione ul.nav_secondolivello:visible').attr('id');
6. if ($(this).is ('.active, .colore') && $(attivataA != '#'+paragone)) {
7. 
   
8. $('#navigazione ul.nav_secondolivello:visible').fadeOut(0, 
10. function (){
12. $(attivataA+'_sez').fadeIn(400)}
13.       );
14. }

thanks in advice.

theApprentice