JavaScript的事件冒泡(转载)
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//]]></script></head><body><h1>Bubble in JavaScript DOM</h1><p>DOM树的结构是：</p><pre><code>UL - LI - A - SPAN</code></pre><div> <ul> <li><a href="#"><span>Bubbllllllllllllllle</span></a></li> <li><a href="#"><span>Bubbllllllllllllllle</span></a></li> </ul></div><textarea></textarea><p>鼠标进入UL的任何一个子元素，如果不停止冒泡，我们从UL到SPAN都定义了鼠标悬停（<code>mouseover</code>）事件，这个事件会上升了UL，从而从鼠标所进入的元素到UL元素都会有红色的边。</p><div> <ul> <li><a href="#"><span>Bubbllllllllllllllle</span></a></li> <li><a href="#"><span>Bubbllllllllllllllle</span></a></li> </ul></div><p>如果停止冒泡，事件不会上升，我们就可以获取精确的鼠标进入元素。</p></body></html>
http://realazy.org/blog/2007/04/09/javascript-bubble-demo/
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