51help TIY
码：
<html> <head> <script type="text/javascript"> function getRelatedElement(event) { alert("The cursor just exited the " + event.relatedTarget.tagName + " element."); } </script> </head> <body> <p onmouseover="getRelatedElement(event)">Mouse over this paragraph.</p> </body> </html>
查看结果: