Question

I need fix this little code:

jQuery(document).ready(function() {

    $('.plus').click(function(){
        $('#top:hidden').show('slow');
        $('.plus').click(function(){
            $('#top:visible').hide('slow');

        });
    });
});

Answer 1

You do not need to bind click twice, rather you can put condition to show and hide.

$('.plus').click(function(){
    if($('#top').is(':visible')
         $('#top').hide('slow');
   else
         $('#top').show('slow');        
});

You can also use toogle event

$('.plus').toggle(function(){
      $('#top').show('slow');
},  
function(){
       $('#top').hide('slow');
});