兼容firefox,ie,谷歌,阻止浏览器冒泡事件,Firefox不支持event解决方法

 //        获取事件
function getEvent(){ if(window.event) {return window.event;} func=getEvent.caller;
while(func!=null){ var arg0=func.arguments[0];
if(arg0){ if((arg0.constructor==Event || arg0.constructor ==MouseEvent
|| arg0.constructor==KeyboardEvent) ||(typeof(arg0)=="object" && arg0.preventDefault
&& arg0.stopPropagation)){ return arg0;
} } func=func.caller;
} return null;
} //阻止冒泡
function cancelBubble() { var e=getEvent();
if(window.event){ //e.returnValue=false;//阻止自身行为
e.cancelBubble=true;//阻止冒泡
}else if(e.preventDefault){ //e.preventDefault();//阻止自身行为
e.stopPropagation();//阻止冒泡
} }

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