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源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> </head> <body> <script> function changeImage() { element=document.getElementById('myimage') if (element.src.match("bulbon")) { element.src="/try/demo_source/bulboff.gif"; } else { element.src="/try/demo_source/bulbon.gif"; } } </script> <img border="0" height="180" id="myimage" onclick="changeImage()" src="/try/demo_source/bulboff.gif" width="100"> <p>点击灯泡 开/关 灯</p> </body> </html>
运行结果