下面是一个启动示例

document.onclick = function(evt){

    evt =  evt  ||  window.event;
    var element = evt.target  ||  evt.srcElement;

};

无论您在何处单击，都会获得对获得点击的元素的引用.

wherever you click you get a reference to the element that received the click.

在实际情况下，更有用的是使用 attachEvent 方法，或 addEventListener 其余.

More useful, though, in a real scenario would be to use the attachEvent method for IE, or the addEventListener for the rest.