I have problem with this script. It should change images according to on which link you hover. I suppose it is written good and I have no idea why it doesn't work ..

1. $(document).ready(function() {
2.     $(".byt").bind("mouseenter",function() {
3.          stary_byt = $("#patro").attr("src");
4.          novy_byt = $(this).attr("id");
5.         $("#patro").attr({src : "patra/"+novy_byt+".gif"});
6.     }).bind("mouseleave",function() {
7.         $("#patro").attr({src : stary_byt});
8.     });
9. });