## 事件绑定 ``` /*兼容性封装事假的绑定*/ var EventUtil = { addHandler: function (oElement, sEvent, fnHandler) { oElement.addEventListener ? oElement.addEventListener(sEvent, fnHandler, false) : oElement.attachEvent("on" + sEvent, fnHandler) }, removeHandler: function (oElement, sEvent, fnHandler) { oElement.removeEventListener ? oElement.removeEventListener(sEvent, fnHandler, false) : oElement.detachEvent("on" + sEvent, fnHandler) }, addLoadHandler: function (fnHandler) { this.addHandler(window, "load", fnHandler) } } ```