ddlevelsmenu script 404 error

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1) ddlevels menu
2) ddlevelsmenu.txt

3) I have been using this for many years. About a week ago I ask my web host company (hostgator) to add a security certificate to my website, which they did. Now when I mouse over the menu, I get an overlay indicating a 404 error. The menu still worked, but I'm guessing I need to update it because of the security certificate addition.

Please advise.

This is what the page looks like. Everything works ok, but it's just imposing an overlay image.