跨浏览器阻止事件冒泡

function stopEvent(event){ //阻止冒泡事件
     //取消事件冒泡
                 var e=arguments.callee.caller.arguments[0]||event; //若省略此句，下面的e改为event，IE运行可以，但是其他浏览器就不兼容
                 if (e && e.stopPropagation) {
                 // this code is for Mozilla and Opera
                    e.stopPropagation();
                 } else if (window.event) {
                 // this code is for IE
                    window.event.cancelBubble = true;
                 }