Script Junkie | How to Debug Your jQuery Code

• Firebug—Although many developers have used Firebug, I don't think that many understand the true potential of its debugging capabilities. If you know your tools inside out, you can become a more productive and efficient programmer. Note: If you aren't using Firefox, the Firebug Lite bookmarklet can come in handy to provide many of the nice debugging features of its Firefox add-on counterpart. I tend to use this bookmarklet primarily with Google Chrome.
• FireQuery—This Firefox Firebug add-on provides some nice features to Firebug, such as letting you see which jQuery events are attached to what DOM elements, displaying any data elements that are attached to a DOM element, and providing the ability to inject jQuery into Web pages that don't have it already loaded.
• FireFinder—This Firefox Firebug add-on can help you find the selector you are looking for. You can test the selector you have, and it will highlight all those items on your Web page.

via msdn.microsoft.com

todo: checkout firequery, firefinder...