Prototype + jQuery or jQuery alone!

Hi all,

I've tried to remove prototype in rails using jrails.

I found that many plugin using prototype are difficult to remove, e.g.
ym4r, CalendarHelper and LiveValidation.

Has anyone successfully remove prototype in rails (i mean the
prototype.js can be deleted)? What is your solution? If it's not good,
it's ok to let prototype survive in some pages.

I don't know whether the jrails is the best solution or any other
"hand" made solution like
is better.

Thanks much,