案例:HTML DOM案例     状态:可编辑再运行    进入横版
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<html>
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<head>
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<script type="text/javascript">
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function bgChange(bg)
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{
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document.body.background=bg
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}
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</script>
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</head>
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<body>
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<b>请把鼠标移动到这些图片上,背景会发生变化:</b>
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<table width="300" height="100">
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 <tr>
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  <td onmouseover="bgChange('/img/eg_bg_03.gif')" 
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      background="/img/eg_bg_03.gif">
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  </td>
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  <td onmouseover="bgChange('/img/eg_bg_04.gif')" 
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      background="/img/eg_bg_04.gif">
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  </td>
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  <td onmouseover="bgChange('/img/eg_bg_06.gif')" 
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      background="/img/eg_bg_06.gif">
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  </td>

 运行结果 
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