Not to start a holy war or anything, but I think the choice would be between YUI or Dojo and not JQuery to YUI, if you where trying to make a comparison. They k

Not to start a holy war or anything, but I think the choice would be between YUI or Dojo and not JQuery to YUI, if you where trying to make a comparison. They kind of compete in different spaces. to me YUI and Dojo try to provide a full stack in the browser for (and I hate to use the word) enterprise scale applications. They are trying to build an application development framework for the browser. Where as the others are trying to make you job of developing web pages easier. Here is my personal opinion on the matter and it is solely based on my preference. YUI and Dojo provide all of the capabilities that the other frameworks provide and in may ways a lot more, but at added complexity. You have to do custom builds to remove out the feature you are not using so that it is a small package. Further they have a verry consistent API so once you understand their constructs it is easy to discover and implement new functionality.Needles to say, if you are implementing a stock trading web app YUI or Dojo should be given serious consideration. The kicker is that they have a steeper learning curve than JQuery, which is a tool that you can pick up and use the first day. That being said I prefer Dojo over all of the frameworks that I have used, because I do that kind of development.