日期:2014-05-16 浏览次数:20576 次
<script   language="javascript"> 
function   msg() 
{ 
alert(document.getElementById("id_5").childNodes.length) 
} 
</script> 
<table   id="mytable"   width="200"   border="0"   align="center"   cellspacing=1   cellpadding=2       > 
    <tr   class=header> 
        <td>   aa   </td> 
    </tr> 
    <tr> 
        <td> 
            <input   type="text"   name="address"   size="40"   value="beijing"   /> 
        </td> 
    <tr   class=header> 
        <td>   bbb   </td> 
    </tr> 
    <tr> 
        <td> 
            <input   type="button"   id="button1"   value="click"   onclick='msg();'   /> 
        </td> 
    </tr> 
    <tr> 
        <td   id="id_5"><input   type="button"   value="button" /></td> 
            
        
    </tr> 
</table>