学步园

var EventUtil = new Object;<br /> /**//*<br /> 此方法用来给特定对象添加事件，oTarget是指定对象,sEventType是事件类型，如click、keydown等， fnHandler是事件回调函数<br /> /**/<br /> EventUtil.addEventHandler = function (oTarget, sEventType, fnHandler) {<br /> //firefox情况下<br /> if (oTarget.addEventListener) {<br /> oTarget.addEventListener(sEventType, fnHandler, false);<br /> }<br /> //IE下<br /> else if (oTarget.attachEvent) {<br /> oTarget.attachEvent("on" + sEventType, fnHandler);<br /> }<br /> else {<br /> oTarget["on" + sEventType] = fnHandler;<br /> }<br /> };<br /> /*<br /> 此方法用来移除特定对象的特定事件，oTarget是指定对象,sEventType是事件类型，如click、keydown等，fnHandler是事件回调函数<br /> /* */<br /> EventUtil.removeEventHandler = function (oTarget, sEventType, fnHandler) {<br /> if (oTarget.removeEventListener) {<br /> oTarget.removeEventListener(sEventType, fnHandler, false);<br /> } else if (oTarget.detachEvent) {<br /> oTarget.detachEvent("on" + sEventType, fnHandler);<br /> } else {<br /> oTarget["on" + sEventType] = null;<br /> }<br /> };<br /> /*<br /> 格式化事件，因为IE和其他浏览器下获取事件的方式不同并且事件的属性也不尽相同，通过此方法提供一个一致的事件<br /> */<br /> EventUtil.formatEvent = function (oEvent) {<br /> //isIE和isWin引用到一个js文件，判断浏览器和操作系统类型<br /> if (isIE && isWin) {<br /> oEvent.charCode = (oEvent.type == "keypress") ? oEvent.keyCode : 0;<br /> //IE只支持冒泡，不支持捕获<br /> oEvent.eventPhase = 2;<br /> oEvent.isChar = (oEvent.charCode > 0);<br /> oEvent.pageX = oEvent.clientX + document.body.scrollLeft;<br /> oEvent.pageY = oEvent.clientY + document.body.scrollTop;<br /> //阻止事件的默认行为<br /> oEvent.preventDefault = function () {<br /> this.returnValue = false;<br /> };<br /> //将toElement,fromElement转化为标准的relatedTarget<br /> if (oEvent.type == "mouseout") {<br /> oEvent.relatedTarget = oEvent.toElement;<br /> } else if (oEvent.type == "mouseover") {<br /> oEvent.relatedTarget = oEvent.fromElement;<br /> }<br /> //取消冒泡<br /> oEvent.stopPropagation = function () {<br /> this.cancelBubble = true;<br /> };<br /> oEvent.target = oEvent.srcElement;<br /> //添加事件发生时间属性，IE没有<br /> oEvent.time = (new Date).getTime();<br /> }<br /> return oEvent;<br /> };<br /> EventUtil.getEvent = function() {<br /> if (window.event) {<br /> //格式化IE的事件<br /> return this.formatEvent(window.event);<br /> } else {<br /> return EventUtil.getEvent.caller.arguments[0];<br /> }<br /> };<br />