驱动事件的addEvent.js代码

                }; 
                if(item[1].substring(0, 2) != "on"){ 
                    item[1] = "on" + item[1]; 
                }; 
                if(item[0].detachEvent){ 
                    item[0].detachEvent(item[1], item[2]); 
                }; 
                item[0][item[1]] = null; 
            }; 
        } 
    }; 
}(); 
addEvent(window,'unload',EventCache.flush);