text: define(function(require, exports, module){
    var _utils = {};
    _utils.cls = require('../Cls');
  
    /**
     * 404错误
     * @class E404
     * @constructor
     */
    var E404 = function(){
      if (this === window){
        return new E404();
      }
  
      Error.call(this, 'Not Found');
      this.status = 404;
      this.name = 'NotFoundErr';
    };
    _utils.cls.inherit(E404, Error);
  
    module.exports = E404;
  });
  