I am using this type of menu as in link : https://github.com/SuperZombi/SwipeMenu_JS/blob/main/examples/swipe_menu.html. when i sroll down the main menu and click on last menu the submenu slides out and overlaps the main menu.here the submenu height remains same as main menu height and if there are few submenus i have to scroll up to view the submenus.How can i scroll the menu to top when new submenu displays?