JavaScript让IE浏览器event对象符合W3C DOM标准
代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<body>
<input id="butt" type="button" value="提交" />
</body>
<script type="text/javascript">
var EventUtil = {};
EventUtil.formatEvent = function(oEvent){
if(window.ActiveXObject){
//W3C event的charCode属性,按下的按键的Unicode值
oEvent.charCode = (oEvent.type == 'keypress') ? oEvent.keyCode : 0;
//W3C event的eventPhase属性
//事件的阶段,可能有以下的值中的一个:
// 0 - 捕获阶段
// 1 - 在目标上
// 2 - 冒泡阶段
oEvent.eventPhase = 2;
//W3C event的isChar属性,表示按下的按键是否有字符与之相关
oEvent.isChar = (EventUtil.charCode > 0);
//W3C event的pageX属性,鼠标相对于页面的X坐标
oEvent.pageX = oEvent.clientX + document.body.scrollLeft;
//W3C event的pageY属性,鼠标相对于页面的Y坐标
oEvent.pageY = oEvent.clientY + document.body.scrollTop;
//W3C event的preventDefault方法,阻止事件的默认行为
oEvent.preventDefault = function(){
this.returnValue = false;
};
//W3C event的relatedTarget属性,事件的第二目标,经常用于鼠标事件
if(oEvent.type == 'mouseout'){
oEvent.relatedTarget = oEvent.toElement;
}else if(oEvent.type == 'mouseover'){
oEvent.relatedTarget = oEvent.fromElement;
}
//W3C event的stopPropagation方法,取消冒泡事件
oEvent.stopPropagation = function(){
this.cancelBubble = true;
};
//W3C event的target属性
oEvent.target = oEvent.srcElement;
//W3C event的timestamp属性,创建当前时间,并返回毫秒数
oEvent.time = (new Date()).getTime();
}
return oEvent;
};
EventUtil.getEvent = function(){
if(window.event){
// IE 下返回event对象
return this.formatEvent(window.event);
}else{
// W3C 下返回event对象
return EventUtil.getEvent.caller.arguments[0];
}
};
document.getElementById('butt').onclick = function(){
var oEvent = EventUtil.getEvent();
alert(oEvent);
};
</script>
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