案例:HTML DOM案例     状态:可编辑再运行    进入竖版
 运行结果 
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<html>
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<head>
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<script type="text/javascript">
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cc=0
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function changeimage()
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{
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if (cc==0) 
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{
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cc=1
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document.getElementById('myimage').src="/img/eg_bulbon.gif"
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}
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else
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{
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cc=0
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document.getElementById('myimage').src="/img/eg_bulboff.gif"
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}
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}
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</script>
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</head>
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<body>
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<img id="myimage" onclick="changeimage()" 
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border="0" src="/img/eg_bulboff.gif" 
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width="100" height="180" />
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<p>请点击这个灯泡,把它点亮吧!</p>
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</body>
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</html>
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