JavaScript动态修改表格单元格列跨度(colspan)示例

<!DOCTYPE html>
<html>
<head>
<script>
function setColSpan()
{
var x=document.getElementById('myTable').rows[0].cells;
x[0].colSpan="2";
x[1].colSpan="6";
}
</script>
</head>
<body>
<table id="myTable" border="1">
<tr>
<td colspan="4">cell 1</td>
<td colspan="4">cell 2</td>
</tr>
<tr>
<td>cell 3</td>
<td>cell 4</td>
<td>cell 5</td>
<td>cell 6</td>
<td>cell 7</td>
<td>cell 8</td>
<td>cell 9</td>
<td>cell 10</td>
</tr>
</table>
<form>
<input type="button" onclick="setColSpan()" 
value="Change colspan">
</form>
</body>
</html>