请问javascript可以判断表格中的数字是几吗?

Question

试试<td style="display:none">
和<td style="visibility:hidden">

Answer 1

<SCRIPT LANGUAGE="JavaScript">
<!--
window.onload=function(){
var tds=tab1.getElementsByTagName("td");
tds[0].style.display="none";}
//-->
</SCRIPT><table width="301" border="1" cellpadding="5" cellspacing="0" id="tab1">
<tr>
<td width="47">1</td>
<td width="47">2</td>
<td width="47">3</td>
<td width="47">4</td>
<td width="51">5</td>
</tr>
</table>

Answer 2

试试这个<table      border="1"   cellpadding="5"   cellspacing="0"   id="tab1">   
      <tr>   
          <td  id="td1" width="47">1</td>   
          <td   width="47">2</td>   
          <td   width="47">3</td>   
          <td   width="47">4</td>   
          <td   width="51">5</td>   
      </tr>  
  </table>
  <input type="button" value="隐　藏" name="button1">
     <input type="button" value="显　示" name="button2">
<script>
button1.onclick=function(){ td1.style.display = "none" }
button2.onclick=function(){ td1.style.display = "block" }
</script>

Answer 3

<table      border="1"   cellpadding="5"   cellspacing="0"   id="tab1">   
      <tr>   
          <td  id="td1" width="47">1</td>   
          <td   width="47">2</td>   
          <td   width="47">3</td>   
          <td   width="47">4</td>   
          <td   width="51">5</td>   
      </tr>  
  </table>
  <input type="button" value="隐　藏" name="button1">
     <input type="button" value="显　示" name="button2">
<script>
button1.onclick=function(){ document.getElementById("tab1").childNodes(0).childNodes(0).childNodes(0).style.display = "none" }
button2.onclick=function(){ document.getElementById("tab1").childNodes(0).childNodes(0).childNodes(0).style.display = "block" }
</script>

Answer 4

<table      border="1"   cellpadding="5"   cellspacing="0"   id="tab1">   
      <tr>   
          <td  id="td1" width="47">1</td>   
          <td   width="47">2</td>   
          <td   width="47">3</td>   
          <td   width="47">4</td>   
          <td   width="51">5</td>   
      </tr>  
  </table>
  <input type="button" value="隐　藏" name="button1">
     <input type="button" value="显　示" name="button2">
<script>
button1.onclick=function(){ document.getElementById("tab1").rows[0].cells[0].style.display = "none" }
button2.onclick=function(){ document.getElementById("tab1").rows[0].cells[0].style.display = "block" }
</script>