Javascript 阻止javascript事件冒泡，获取控件ID值

1. 如何阻止事件冒泡

//非IE 
if (event && event.stopPropagation) 
event.stopPropagation(); 
else//IE 
window.event.cancelBubble = true;

2.获取控件ID

if (document.all) { 
//IE 
alert(event.srcElement.tagName+":"+event.srcElement.id); 
} 
else { 
//Firefox 
alert(event.target.tagName + ":" + event.target.id); 
}