<script>

function displayResult(){

    document.getElementById("td1").style.verticalAlign="bottom";

}

</script>

<table border="1" height="100px">

  <tr>

    <td id="td1">一些实例文本</td>

  </tr>

</table>

<br>

<input type="button" onclick="displayResult()" value="对齐文本">

​