Javascript book referal

Using a site point book, “html utopia: designing w/out tables using css” by shafer & andrew. It is actually pretty good & easy to follow.
Can anyone advise as to another good book for learning javascript where they take you step by step in building it into a website?
Thx
D

I would suggest:
Simply javascript: http://www.sitepoint.com/books/javascript1/ By Kevin Yank and Cameron Adams.
Using JQuery is a good idea too to achieve great behavior effect in shorter times and then I would suggest: JQUERY: NOVICE TO NINJA http://www.sitepoint.com/books/jquery1