案例:javascript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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function cell()
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  {
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  var x=document.getElementById('myTable').rows[0].cells;
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  alert(x[0].innerHTML);
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  }
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</script>
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</head>
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<body>
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<table id="myTable" border="1">
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<tr>
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<td>cell 1</td>
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<td>cell 2</td>
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</tr>
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<tr>
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<td>cell 3</td>
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<td>cell 4</td>
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</tr>
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</table>
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<br />
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<input type="button" onclick="cell()" value="显示第一个单元">
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</body>
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</html>
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