I’ve found the source of the problem: “WP Accessibility” plugin causes the conflict. I have no idea how to solve it, ’cause I need accessibility features. I guess I’ll look for another accessibility plugin.
Thanks for Your answer. In a few days I’ll migrate to public addres, so then I’ll give url here. Unfortunately I’m not good in javascript, so I’m not able to find erros in it by myself.
I have the same problem. How did You solved it at Your page?
