"snoork" asked me for some more info.
So let's assume you have a template using show_menu2() to create the menu and jQueryAdmin installed.
The menu call looks like this:
'<ul class="sf-menu sf-navbar">',
The important part is the '<ul class="sf-menu sf-navbar">'.
Okay, next, go to the Backend -> Admin-Tools -> jQueryAdmin and click on the "plus" icon next to the "Plugins" header. You'll get an upload window on top of the page. Upload the Superfish plugin you can download at AMASP
After uploading, click on the "gear" icon next to the "default.jquery" preset and mark "Superfish" in the Plugins row. Save the changes.
You should now see your Superfish enhanced menu in the frontend, but there's a detail missing: you wish to keep the submenu open for the current root page.
This can be done by adding
to the Superfish call. (Sorry, it's not menu-current as mentioned above.)
To add this, klick on the "Notepad" icon next to the "default.jquery" preset in the jQueryAdmin Tool and change the "pathClass" to "menu-parent".
Now, after clicking on a root menu entry that has children, the submenu should stay open.
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