Change code style according to the style guide: http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml
Change code style according to the style guide:
http://google-styleguide.googlecode.com/svn/trunk/javascriptguide.xml

Review URL: http://codereview.appspot.com/4065042
linqiangl/compatibility-detector,linqiangl/compatibility-detector,linqiangl/compatibility-detector