[jQuery] Re: 'this.$event[...].keys' is null or it isn't an object

I still have this problem ... please help me :-

[jQuery] 'this.$event[...].keys' is null or it isn't an object

Hi, I've insterted in my page an external JS menu... now I see all right but when I press F5 key (or when I close the page) I see this error: Row 1 char 1 'this.$event[...].keys' is null or it isn't an object index.php?m=account_home I don't know how to resolve this problem :-( I hope you ca