1. You should not generate your URL's clientside. Instead, generate via ComponentResources serverside and add a "data-url" attribute instead.
2. When I look at the tapestry-jquery page here http://tapestry5-jquery.com/mixins/docsbind I can see an include for bind.js ( http://tapestry5-jquery.com/assets/40a195d04cdc0bf0/app/assets/mixins/bind/bind.js ) In bind.js, I can see that tapestry-jquery uses element.tapestryZone(…) to update a zone. I'd probably do the same instead of using $.ajax(…)