Added log class that I sometimes use.

log.js

@@ -0,0 +1,41 @@
+/**
+ * Logging class which ignores logging unless we set a level to output
+ */
+var Log = {
+	levels: $A(['off', 'info', 'debug', 'error']),
+	_level: 'off',
+	_levelNotFoundValue: -1,
+
+	// writes to the log if the level is appropriate and we have our Firebug console
+	write: function(level, msg) {
+		if (Log.getLevel() == 'off') return;
+		var cur_level = Log.getLevelIndex(Log.getLevel());
+		var req_level = Log.getLevelIndex(level);
+		// only log if level exists and it is greater than or equal the the current level
+		if (req_level != Log._levelNotFoundValue && cur_level <= req_level) {
+			try {
+				console.log(level + ': ' + msg);
+			} catch(e) {
+				// fail silently
+			}
+		}
+	},
+
+	// creates functions to write to the log at the various levels
+	info: 	function(msg) { Log.write('info', msg); },
+	debug: 	function(msg) { Log.write('debug', msg); },
+	error: 	function(msg) { Log.write('error', msg); },
+
+	// gets the levels array index of a level
+	getLevelIndex: function(level) { return (Log.levels.include(level) ? Log.levels.indexOf(level) : Log._levelNotFoundValue); },
+
+	// returns the current level string value
+	getLevel: function() { return Log._level; },
+
+	// sets the level of logging to output
+	level: function(level) { 
+		Log._level = Log.levels.include(level) ? level : null;
+		if (Log._level == null) { throw('Log level does not exist'); }
+	}
+}
+Log.level('info');