隐藏表格里面的一行,怎么实现?

Question

不占位
<table id="tb">
<tr><td>1</td></tr>
<tr><td>2</td></tr>
<tr><td>3</td></tr>
<tr><td>4</td></tr>
<tr><td>5</td></tr>
</table>
<script>
tb.rows[2].style.display="none";
</script>占位:<table id="tb">
<tr><td>1</td></tr>
<tr><td>2</td></tr>
<tr><td>3</td></tr>
<tr><td>4</td></tr>
<tr><td>5</td></tr>
</table>
<script>
tb.rows[2].style.visibility="hidden";
</script>

Answer 1

<table>
<tr><td>1</td></tr>
<tr><td>2</td></tr>
<tr><td style="visibility:hidden">3</td></tr>
<tr><td>4</td></tr>
<tr><td>5</td></tr>
</table>实际是这样,不知道为什么刚才不行?