This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
In a web application, it's a really bad idea to use page-relative URLs. Chances are, they are not addressing what you think they are since the URLs don;t generally reflect real forlders but are servlet mappings.
P.S. One quick way to find out if jQuery is loaded is to do: alert(jQuery). And see what you get.