scrollbar inside the tables

[Galeon]

I have installed a mod of latest threads on forumhome from a Taiwan VBB forum.
How can I put a scrollbar inside the tables?
Just like my existing phpbb.

Thank you.

FORUMHOME

<if condition="$vboptions['shownewpost']">
<table class="tborder" cellpadding="3" cellspacing="1" border="0" width="100%" align="center">
	<tr>
		<td class="thead" width="100%">
		<if condition="$show['threadratings']"><span style="float:$stylevar[right]">$vbphrase[rating] $sortarrow[voteavg]</span></if>
		$vbphrase[newpostslist]
		</td>
		<td class="thead" width="150" align="center" nowrap="nowrap"><span style="white-space:nowrap">$vbphrase[thread_starter]</span></td>
		<td class="thead" width="150" align="center" nowrap="nowrap"><span style="white-space:nowrap">$vbphrase[last_post] $sortarrow[lastpost]</span></td>
		<td class="thead" width="30" align="center" nowrap="nowrap"><span style="white-space:nowrap">$vbphrase[replies] $sortarrow[replycount]</span></td>
		<td class="thead" width="30" align="center" nowrap="nowrap"><span style="white-space:nowrap">$vbphrase[views] $sortarrow[views]</span></td>
		</tr>
		$forumhome_latestthreadslist
</table>
<br>
</if>

forumhome_latestthreadslistbit

		<tr>
	<td class="alt1Active" id="t$thread[threadid]" title="$thread[preview]">
		<div>
			<a href="showthread.php?$session[sessionurl]t=$thread[threadid]$thread[highlight]">$thread[title]</a>
		</div>
	<td class="alt2" align="center">$thread[postusername]</td>
	<td class="alt2">
		<div class="smallfont" style="text-align:$stylevar[right]; white-space:nowrap">
			<!--<span class="time">$thread[lastpostdate] $thread[lastposttime]</span><br />-->
			<phrase 1="member.php?find=lastposter&amp;t=$thread[threadid]" 2="$thread[lastposter]">$vbphrase[by_x]</phrase>  <a href="showthread.php?$session[sessionurl]goto=lastpost&amp;t=$thread[threadid]"><img class="inlineimg" src="$stylevar[imgdir_button]/lastpost.gif" alt="$vbphrase[go_to_last_post]" border="0" /></a>
		</div>
	</td>
	<td class="alt1" align="center"><a href="#" onclick="who($thread[threadid]); return false;">$thread[replycount]</a></td>
	<td class="alt2" align="center">$thread[views]</td>
</tr>