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EventUtil.js
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EventUtil.js
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/**
* 跨浏览器事件处理工具。只支持冒泡。不支持捕获
* @author ([email protected])
*/
var EventUtil = {
getEvent: function (event) {
return event || window.event;
},
getTarget: function (event) {
return event.target || event.srcElement;
},
// 返回注册成功的监听器,IE中需要使用返回值来移除监听器
on: function (elem, type, handler) {
if (elem.addEventListener) {
elem.addEventListener(type, handler, false);
return handler;
} else if (elem.attachEvent) {
var wrapper = function (event) {
return handler.call(elem, event);
};
elem.attachEvent('on' + type, wrapper);
return wrapper;
}
},
off: function (elem, type, handler) {
if (elem.removeEventListener) {
elem.removeEventListener(type, handler, false);
} else if (elem.detachEvent) {
elem.detachEvent('on' + type, handler);
}
},
preventDefault: function (event) {
if (event.preventDefault) {
event.preventDefault();
} else if ('returnValue' in event) {
event.returnValue = false;
}
},
stopPropagation: function (event) {
if (event.stopPropagation) {
event.stopPropagation();
} else if ('cancelBubble' in event) {
event.cancelBubble = true;
}
}
};