Horizontal menu with Pages and Subpages

Hello,

I would like to create a horizontal menu with pull down menus that would show SubPages and SubSubpages. I figured out how to make this as a list, but not how to include it in the menu.

I would like to integrate it into a G5 menu by https://www.yxscripts.com/ and therefore I would need an option to insert each separate Page link into additional code. I knew how to make this in MovableType, but have not been able to figure it out in WP.

If I use this code:
<?PHP wp_list_pages(“child_of=19&sort_column=menu_order&title_li=”); ?>
I get a complete list of SubPages and SubSubPages. I would like to insert each separate link itno the following code:

addLink(“tool1-sub”, “SubPage Name”, “SubPage Link”, “”, “”);
addLink(“tool1-sub”, “SubPage1 Name”, “SubPage1 Link”, “”, “”);

And this would have to be for every link. And similar code also for SubSubPages.

Any ideas on how can I do that? Or is there a better way to create such horizontal menu?

I would really appreaciate any advice.

Best regards,
Peter