jquery 设置文字加粗

            <table width="100%" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td width="135" align="center" background="../images/hsd/jrht_bj1.gif" id="showday1" style="cursor:pointer"  onclick="changeshow(1)"><strong>今日话题</strong></td>
    <td width="135" align="center" background="../images/hsd/jrht_bj2.gif" id="showday2" style="cursor:pointer" onclick="changeshow(2)">新鲜问答</td>
    <td align="right" class="more"><a href="#">浏览全部>></a></td>
  </tr>
</table>
就是状态转换,要把新鲜问答文字加<strong>

function changeshow(a)
{

$("#showday2").css("background-image","url(../images/hsd/jrht_bj1.gif)");
$("#showday2").html("<strong>新鲜问答</strong>");
}

有更好的解决方法吗，比如直接加上<strong>或减去这个标签的方法