Backward Compatibility with 1.4.1 for Visual Studio with JQueryUI 1.8.12

Backward Compatibility with 1.4.1 for Visual Studio with JQueryUI 1.8.12

Hi,

I'm new to JQuery and pretty new to Javascript in general.  I have a question about running the current version 1.8.12 which I downloaded and came with 1.5.1.min.js with the current version 1.4.1 which comes with the intellisense docs for Visual Studio.

Am I forced to go to 1.5.1 for JQueryUI and give up intellisense?
or
Can I reference the 1.4.1 library or does 1.8.12 need the 1.5.1 to operate normally? 
or
Can I somehow target a specific version of the javascript on the page?

Again, I'm new so I may not be thinking about this the right way.  Any suggestions would be greatly appreciated.


Thanks in advance!

Karl