If your submenu is extending from a link in the middle of the parent list, you don't want the current submenu to disappear if your mouse tracks across the corne

If your submenu is extending from a link in the middle of the parent list, you don't want the current submenu to disappear if your mouse tracks across the corner of the link above or below the intended. Consider this: The link A | A sublink of B Some Link B --> | Another sublink of B A link C | And again a sublink of B | Jez, B has a lot of sublinks If the user mouses over "Some Link B" and the submenu expands, without a delay (or other mechanism such as the triangle effect described in the article) the submenu could disappear when the user tries to move from "Some Link B" to "Jez, B has a lot of sublinks" if it happened to cross the plane into "A link C" or out of the navigation list entirely.