Got to be dear to my grumpy fish heart. If you did not know, leefish uses MyBB, a fantastic free forum software. Right now, version 1.6 of the software uses the Prototype library. Its a great library, but its big and its old and really isnt as maintained as it used to be.
jQuery is now one of the (if not the) most popular js frameworks. It is easy to find great code snippets and drop them in your app - if you load jQuery as well. Two libraries for a snippet? Awww, cant have that candy then as that is overkill. But WAIT : I found this cool little site You Might Not Need JQuery com
Check it out.