I honestly think we should make our own "jQuery". All the libraries out there such as jQuery, Mootools, Dojo, etc are just, in my opinion, a waste of space. We won't need all the fancy stuff they offer, we'll probably just need DOM selection/manipulation, event binding and some Array/String prototypes. Therefore I think we should make our own which would be much smaller with the functionalities we need. Also, I saw an article about jQuery, they basicly prooved that jQuery was very slow compared to normal dom selection, because of it's enormous API.