$(document).ready(function() {
    //podmiana obrazków
    $('.offerDetails .left .smalImages .small img').click(function(){
       var new_big = $(this).attr('src');
       var new_nr = $(this).next().val();
       
       $('.offerDetails .left .mainImage img').attr('src',new_big);
       $('.offerDetails .left .mainImage input').val(new_nr);
    });



});