Console Panel Firebug

Message types

The console knows four different types of messages, which are described below:

Error: console.error(object[, object, ...]) Error messages occurring in JavaScript, CSS, XML, chrome, network and stack trace

Warning: console.warn(object[, object, ...])Warnings occurring in JavaScript and CSS

Info: console.info(object[, object, ...])Informative messages

Debug: console.debug(object[, object, ...]) Debugging messages

http://getfirebug.com/wiki/index.php/Console

http://getfirebug.com/wiki/index.php/Console_API