console 객체를 사용하여 디버깅하기
http://www.deadfire.net/jscript/projscript003.html
https://developer.mozilla.org/en-US/docs/Web/API/Console.log
http://msdn.microsoft.com/ko-kr/library/gg589530(v=vs.85).aspx
http://www.w3schools.com/js/js_output.asp

IE 9 에서의 좀더 자세한 디버깅 방법
http://msdn.microsoft.com/ko-kr/library/gg699336(v=vs.85).aspx

크롬 개발자도구 활용하기 강좌
http://opentutorials.org/course/580/2865
Code School

console 명령어
http://getfirebug.com/wiki/index.php/Command_Line_API

리모트 디버깅
https://developer.chrome.com/devtools/docs/remote-debugging