源代码 ：
点击运行
<html> <head> <script type="text/javascript"> function whichElement(e) { var targ if (!e) var e = window.event if (e.target) targ = e.target else if (e.srcElement) targ = e.srcElement if (targ.nodeType == 3) // defeat Safari bug targ = targ.parentNode var tname tname=targ.tagName alert("You clicked on a " + tname + " element.") } </script> </head> <body onmousedown="whichElement(event)"> <p>在文档中点击某个位置。消息框会提示出您所点击的标签的名称。</p> <h3>这是标题</h3> <p>这是段落。</p> <img src="eg_mouse2.jpg" /> </body> </html>
运行结果