This folder contains copies of the required jQuery libraries for use with Dynatree 1.0 Currently using - jquery.js: jQuery 1.4.4 - jquery-ui.custom.js: jQuery UI 1.8.7 with 'UI Core' and 'Interactions' modules. ('Widgets' and 'Effects' are not contained in this custom build) - jquery.min.js and jquery-ui.custom.min.js: Minified versions of the above Current versions are always available at http://docs.jquery.com/Downloading_jQuery and http://jqueryui.com/download Include the required libs like this: Alternatively the current libs may be we included from CDNs, for example