[xwiki-users] jQuery

Hi, I've installed the query helper: http://extensions.xwiki.org/xwiki/bin/view/Extension/jQuery+Helpers But it looks like the jquery.jquery is empty, contains no object of class javascriptextension? Why would I need to load the jquerry into such a page, could I not just get it from: links to the CDN-hosted copies of jQuery? If this is possible; how do I do this? If $xwiki.jsx.use('jQuery.jQuery', {'defer': false}) is used the script is always in the header of the html page? But If I would like to load a script somewhere in the body, how do I do that, not use $xwiki.jsx.use? Would I need to write it inside a html macro? Gerritjan