log4javascript provides JavaScript developers with a familiar, robust, and flexible logging framework which you will be able to debug JavaScript applications. This is becoming increasingly important as Web interfaces become richer.log4javascript is based on Java's log4j and is tested and works across all recent major browsers, including IE5+ (for Windows), Firefox, Mozilla, Netscape 7+, Safari 1.3+, and Opera 7.5+.What's New in This Release: [ read full changelog ]· Fixed document.domain/query string bug (#2519903 on Sourceforge Tracker)· Added isVisible() method to PopUpAppender· Added check for whether the console has been closed in isVisible() method of InPageAppender· Included unit tests in the distribution

Ссылка: http://download..et/log4javascript/log4javascript-1.4.1.zip