Hover Effect in Top level navigation in Portal 7.3

Hi All,

We have achieved hover effect till 3 levels in Portal 7.3
We have tried to implement 4th level,but we are facing issue

Kindly help me to implement 4 level hover effect in portal 7.3 (EHP6).
Please find the attached CSS and JSP file for 3 level hovering and 4 level hovering in which we are facing the above issue.

Regards,

Sarita Agrawal