阻止事件冒泡

function stopEvent(){ //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;
}
}