In one of my DotNetNuke sites, I have a folder full of XML files. Some had become invalid recently. Here's how I tracked them down.
Since DotNetNuke adopted jQuery into the DNN core, I have been using it. Here is another tip for a common scenario.
We at RezHub.com are upgrading our standard JavaScript code to use jQuery going forward. Today was my first day of just learning jQuery, and not just tinkering with it.