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In a word. No. Third party Spry menus use HTML and generally some scripting language as well.
If you can find an example or code of what you want, then we can look at it and hopefully guide you through.
Yola's sitebuilder is becoming less and less conducive to customised solutions like this, so it is better to use one of the Yola options if possible. Yola have both drop down menus and flyover menus for certain styles and these approximate the classical Spry menus used widely.