javascript的取值问题

Question

 <td  id="TD_JC_SD_SOCORE_0"  nowrap  
       align="center">
       3
    </td>

Answer 1

<td id="TD_JC_SD_SOCORE_0" nowrap  
  align="center">
  3
  </td>
<script type="text/javascript">
onload = function(){
alert(document.getElementById("TD_JC_SD_SOCORE_0").innerHTML);
}
</script>

Answer 2

<td id="TD_JC_SD_SOCORE_0" nowrap  
  align="center">
  3
  </td>
<script type="text/javascript">
window.onload = function(){
alert(document.getElementById("TD_JC_SD_SOCORE_0").innerHTML);
};
</script>
这个应该没问题啊~

Answer 3

<table><tr>
<td id="TD_JC_SD_SOCORE_0" nowrap  
  align="center">
  3
  </td></tr></table>
<script type="text/javascript">
onload = function(){
alert(document.getElementById("TD_JC_SD_SOCORE_0").innerHTML);
}
</script>
td不能单独存在