console 命令行工具 X clear

console

function changeContent()
{
var x=document.getElementById('myTable').rows[0].cells
x[0].innerHTML="新的内容"
}

<table id="myTable" border="1"> 
  <tbody>
   <tr> 
    <td>Row1 cell1</td> 
    <td>Row1 cell2</td> 
   </tr> 
   <tr> 
    <td>Row2 cell1</td> 
    <td>Row2 cell2</td> 
   </tr> 
   <tr> 
    <td>Row3 cell1</td> 
    <td>Row3 cell2</td> 
   </tr> 
  </tbody>
 </table> 
 <form> 
  <input type="button" onclick="changeContent()" value="改变内容"> 
 </form>