To debug your javascript code...
* Using Internet Explorer
Make sure that u untick Disable Script Debuging options.
* for Firefox.. There is extension plugin
*Configure your web config .. to enable debug...
* Press F5 for build with debugging instead of Shift + F5.
* You may need to separate your javascript into other file... It can not be embedded into your .aspx file because at the runtime.. your *.aspx content will dynamically converted into html...
However in VS 2005.. You can debug your embeded javascript...
But you can not directly put a break point into that line of code...
You need to Run first (F5) and go to DEBUG > WINDOWS > Script Explorer... You will see.. the merge javascript with your aspx which has been converted into html... and you can put the break point in there.
* USE ASP.NET AJax Extender...
You can use
Sys.Debug.trace("Whatever you want to trace - will appear in output window");
and
Sys.Debug.fail("It will stop in this point.. and you may start debugging");
