This problem after instal plugin ultimate facebook

Hi,
I active and then desactive this plugin becasus first firfox can not load the page, redirect detected that never ends.
And left me these problems, can you tell me a solution?

wp-includes/js/scriptaculous/effects.js?ver=1.8.3

/wp-includes/js/scriptaculous/dragdrop.js?ver=1.8.3

/wp-includes/js/scriptaculous/slider.js?ver=1.8.3

uncaught exception: script.aculo.us requires the Prototype JavaScript framework >= 1.6.0.3
Prototype is not defined
[Detener en este error] linear: Prototype.K,
effect...r=1.8.3 (línea 73)
Object.isUndefined is not a function
[Detener en este error] if(Object.isUndefined(Effect))
dragdr...r=1.8.3 (línea 8)
Class is not defined
[Detener en este error] Control.Slider = Class.create({
slider...r=1.8.3 (línea 16)
uncaught exception: controls.js requires including script.aculo.us' effects.js library
Object.extend is not a function
[Detener en este error] Object.extend(Modalbox, Modalbox.Methods);
xxxx.com (línea 697)
syntax error
[Detener en este error] auto: ,
xxxx.com (línea 767)
$("#avg").stars is not a function
[Detener en este error] $("#avg").stars();