I had this coded up in straight javascript:  http://jsfiddle.net/x5M7q/

It works, but all my scripts are jquery apart from this one, and since I had jquery already loaded I thought it would be a good idea to convert this to a jquery script.

I have no idea of how to do this with my limited knowledge but the coder said translating this to jquery would have no advantage. So my question is, is this true? I was really hoping it would make my scripts more consistent and I could perhaps cut a few lines out of it. 

Any feedback would be much appreciated.

James