JAVA, JSP, AJAX - Layers for opening categories dynamically - repost

Used technologies: JAVA, JSP, Cayenne, jQuery, AJAX, JavaScript, HTML, XML, MySQL There is a JAVA-Webapplication with server-side category-tree written in JAVA. The category tree contains more than 1000 category-nodes. Task/Requirements: - AJAX implementation: An AJAX solution is required, which performs the requested categories in a dynamic way on a layer. An Example for high quality design level is the categories-layer ("shop by department") on [login to view URL] in the left corner. - on click categories should 1) open children categories and display them 2) display the size of results 3) pre-fetch result-objects of this category, execute query on result-objects and diplay result of this query. Mandatory skills for implementation: JAVA, JSP, jQuery, AJAX. Other skills are nice to have, like Cayenne. The design (look & feel) must be very nice. Good English skills are, naturally, required as well. You will get support during the project. Project-Start: immediately The Budget is between 50 and 500 USD. This job is the first one we publish on freelancer.com. We are looking only for reliable professionals.