Superfish is a Jquery plug-in that can easily create complex multi-level drop-down menus. Superfish is also widely used. You may use Superfish to implement multiple menu effects. : Http://plugins.jquery.com/project/Superfish
Document Description: http://users.tpg.com.au/j_birch/plugins/superfish/#getting-started
Some features and effects of Superfish:
Use pure Css to achieve dynamic results, cross-browser, support for the worst browser IE6
You can set the time for the drop-down menu to hide automatically when the mouse leaves. The default value is 800 milliseconds.
Supports fade-in and fade-out animations
Supports keyboard response
Add a prompt arrow to the parent menu containing sub-menus
Supports shadow effects, but requires good browser support, such as Firefox, chrome... Internet Explorer 6 is the worst browser.
Optional callback js Functions
Instructions for use
1. First, introduce Jquery and Superfish files on the page.