log4js implementation as taken on this date. Just for purposes of seeing it in the cloud.

Log4js.js

var Log4js = {
  version : "1.0",
  applicationStartDate : new Date(),
  loggers : {},
  getLogger : function (categoryName) {
    if (!(typeof categoryName == "string")) {
      categoryName = "[default]";
    }
    if (!Log4js.loggers[categoryName]) {
      Log4js.loggers[categoryName] = new Log4js.Logger(categoryName);
    }
    return Log4js.loggers[categoryName];
  },
  getDefaultLogger : function () {
    return Log4js.getLogger("[default]");
  },
  attachEvent : function (element, name, observer) {
    if (element.addEventListener) {
      element.addEventListener(name, observer, false);
    } else if (element.attachEvent) {
      element.attachEvent('on' + name, observer);
    }
  },
  extend : function (destination, source) {
    for (property in source) {
      destination[property] = source[property];
    }
    return destination;
  },
  bind : function (fn, object) {
    return function () {
      return fn.apply(object, arguments);
    };
  },
  Level : function (level, levelStr) {
    this.level = level;
    this.levelStr = levelStr;
  }
};

Log4js.Level.prototype = {
  toLevel : function (sArg, defaultLevel) {
    if (typeof sArg == "string") {
      var sArg = sArg.toUpperCase();
    }
    switch (sArg) {
    case 'ALL':
    case ALL_INT:
      return Log4js.Level.ALL;
    case 'DEBUG':
    case DEBUG_INT:
      return Log4js.Level.DEBUG;
    case 'INFO':
    case INFO_INT:
      return Log4js.Level.INFO;
    case 'WARN':
    case WARN_INT:
      return Log4js.Level.WARN;
    case 'ERROR':
    case ERROR_INT:
      return Log4js.Level.ERROR;
    case 'FATAL':
    case FATAL_INT:
      return Log4js.Level.FATAL;
    case 'OFF':
    case OFF_INT:
      return Log4js.Level.OFF;
    case 'TRACE':
    case TRACE_INT:
      return Log4js.Level.TRACE;
    default:
      return defaultLevel;
    }
  },
  toString : function () {
    return this.levelStr;
  },
  valueOf : function () {
    return this.level;
  }
};

to.js

var Log4js = {
  version : "1.0",
  applicationStartDate : new Date(),
  loggers : {},
  getLogger : function (categoryName) {
    if (!(typeof categoryName == "string")) {
      categoryName = "[default]";
    }
    if (!Log4js.loggers[categoryName]) {
      Log4js.loggers[categoryName] = new Log4js.Logger(categoryName);
    }
    return Log4js.loggers[categoryName];
  },
  getDefaultLogger : function () {
    return Log4js.getLogger("[default]");
  },
  attachEvent : function (element, name, observer) {
    if (element.addEventListener) {
      element.addEventListener(name, observer, false);
    } else if (element.attachEvent) {
      element.attachEvent('on' + name, observer);
    }
  },
  extend : function (destination, source) {
    for (property in source) {
      destination[property] = source[property];
    }
    return destination;
  },
  bind : function (fn, object) {
    return function () {
      return fn.apply(object, arguments);
    };
  },
  Level : function (level, levelStr) {
    this.level = level;
    this.levelStr = levelStr;
    this.prototype = {
      toLevel : function (sArg, defaultLevel) {
        if (typeof sArg == "string") {
          var sArg = sArg.toUpperCase();
        }
        switch (sArg) {
        case 'ALL':
        case ALL_INT:
          return Log4js.Level.ALL;
        case 'DEBUG':
        case DEBUG_INT:
          return Log4js.Level.DEBUG;
        case 'INFO':
        case INFO_INT:
          return Log4js.Level.INFO;
        case 'WARN':
        case WARN_INT:
          return Log4js.Level.WARN;
        case 'ERROR':
        case ERROR_INT:
          return Log4js.Level.ERROR;
        case 'FATAL':
        case FATAL_INT:
          return Log4js.Level.FATAL;
        case 'OFF':
        case OFF_INT:
          return Log4js.Level.OFF;
        case 'TRACE':
        case TRACE_INT:
          return Log4js.Level.TRACE;
        default:
          return defaultLevel;
        }
      },
      toString : function () {
        return this.levelStr;
      },
      valueOf : function () {
        return this.level;
      }
    };
  }
}