ProtoFish is an advanced dropdown menu script which supports multilevel navigations & built with Prototype.
The script is lightweight (1.3kb minimized), unobtrusive & cross-browser.
The hover class used & delay effect of the menus can be customized with ease.
It is accessible via keyboard using the TAB key & multiple instances of ProtoFish menus can be used on the same webpage.
For demos with various number of of levels & delay effects, click here.
Requirements: Prototype 1.6+
Compatibility: All Major Browsers