How do i replace it with a search button?

[Adam21]

I've tried putting this code on my side column,but i cant seems to place a search button to let it be the submit button.can anyone tell me which part of my code went wrong??

<!-- Search Box -->
<td valign="middle"> <div style="white-space:nowrap">
<form action="http://www.xxxxxxxx.com/forum/search.php" method="post">
<input type="hidden" name="s" value="" />
<input type="hidden" name="do" value="process" />
<input type="hidden" name="securitytoken" value="$bbuserinfo[securitytoken]" />
<input type="hidden" name="showposts" value="0" />
<input type="hidden" name="quicksearch" value="1" />
<input type="text" style="width:120px;" class="bginput" name="query"/>
<input style="font: bold 10px Arial" type="submit" value="Search" /></form>
<a style="text-decoration:none" href="search.php" accesskey="4" rel="nofollow" id="navbar_search" class=""></a>&nbsp;
</div></td>
<!-- /Search Box -->