var ile = '1'; //ile wierszy pokazać

        $('#zwijana_0 tbody tr:nth-child('+ile+')').nextAll().hide();
            
        $('.przycisk_0').toggle(function(){
            $('#zwijana_0 tbody tr:nth-child('+ile+')').nextAll().show();
            return false;
        },
        function(){    
            $('#zwijana_0 tbody tr:nth-child('+ile+')').nextAll().hide();
            return false;
        });



        $('#zwijana_1 tbody tr:nth-child('+ile+')').nextAll().hide();
            
        $('.przycisk_1').toggle(function(){
            $('#zwijana_1 tbody tr:nth-child('+ile+')').nextAll().show();
            return false;
        },
        function(){    
            $('#zwijana_1 tbody tr:nth-child('+ile+')').nextAll().hide();
            return false;
        });


        $('#zwijana_2 tbody tr:nth-child('+ile+')').nextAll().hide();
            
        $('.przycisk_2').toggle(function(){
            $('#zwijana_2 tbody tr:nth-child('+ile+')').nextAll().show();
            return false;
        },
        function(){    
            $('#zwijana_2 tbody tr:nth-child('+ile+')').nextAll().hide();
            return false;
        });

for(var count=0; count<=$("div#sites table").length-1; count++) {

        $('#zwijana_'+count+' tbody tr:nth-child('+ile+')').nextAll().hide();
            
        $('.przycisk_'+count+'').toggle(function(){
            $('#zwijana_'+count+' tbody tr:nth-child('+ile+')').nextAll().show();
            return false;
        },
        function(){    
            $('#zwijana_'+count+' tbody tr:nth-child('+ile+')').nextAll().hide();
            return false;
        });
};

console.log(count);