var tools = { //添加事件 addHandle: function (e, type, handle) { if (e.addEventListener) { e.addEventListener(type, handle, false); } else if (e.attachEvent) { e.attachEvent("on" + type, handle); } else { e["on" + type] = handle; } }, //删除事件 removeHandle: function (e, type, handle) { if (e.addEventListener) { e.removeEventListener(type, handle, false); } else if (e.attachEvent) { e.detachEvent("on" + type, handle); } else { e["on" + type] = null; } }, //得到对象 getEvent: function (event) { return event || window.event; }, //得到元素 getElement:function(event){ return event.target||event.srcElement; }, //阻止冒泡 stopPropagation: function (event) { if (event.stopPropagation) { event.stopPropagation(); } else { event.cancelBubble = true; } }, //阻止默认行为 preventDefault: function (event) { if (event.preventDefault) { event.preventDefault(); } else { event.returnValue = false; } } } var btn = document.getElementById("btn"); var box = document.getElementById("box"); var ha = document.getElementById("ha"); tools.addHandle(ha, "click", function (e) { e = tools.getEvent(e); tools.preventDefault(e); tools.stopPropagation(e); })