What I do is have a separate *_debug.html page, which loads the js files individually. I.e., I have a python build script that auto builds the main.html and mai

What I do is have a separate *_debug.html page, which loads the js files individually. I.e., I have a python build script that auto builds the main.html and main_debug.html from much smaller html, css and js files. This is particularly useful when debugging older versions of IE. For the live non-debug version I also YUI-compress the concatenated js file.