隐藏表格行

Question

function hideone(obj){
obj.style.display="none";
}

Answer 1

for(i=1;i<8;i++){
   hideone(document.getElementById("content" + i));

Answer 2

<script language="javascript">
function closeall()
{
for(i=1;i<4;i++){
   hideone(document.getElementById("content"+i));
}
}function hideone(obj){
alert(obj);
obj.style.display="none";
}
</script><table>
<tr id="content1" style="display:block"><td>1</td></tr>
<tr id="content2" style="display:block"><td>2</td></tr>
<tr id="content3" style="display:block"><td>3</td></tr>
</table>
<INPUT TYPE="button" onclick="javascript:closeall();">