tis whole thing
<tr>
{* <tr class="TopLabel" style="padding-left: 20px; padding-right: 5px;"><a href="javascript
: document.productsearchform.submit();">{$lng.lbl_se arch}:</a></tr> *}
<td valign="middle"><input type="text" name="posted_data[substring]" size="16" value="{$search_prefilled.substring|escape}" /></td>
</tr><tr valign="middle" style="padding-left: 5px; padding-right: 20px;">{* {include file="buttons/search_head.tpl"} *}</tr>
{*<td><a href="search.php"><u>{$lng.lbl_advanced_search}</u></a></td> *}
</tr>
shoud read like this
<tr>
{* <tr class="TopLabel" style="padding-left: 20px; padding-right: 5px;"><a href="javascript
: document.productsearchform.submit();">{$lng.lbl_se arch}:</a></tr> *}
<td valign="middle"><input type="text" name="posted_data[substring]" size="16" value="{$search_prefilled.substring|escape}" /></td>
<td>{include file="buttons/search_head.tpl"}</td>
</tr>
<tr valign="middle" style="padding-left: 5px; padding-right: 20px;">
<td colspan="2"><a href="search.php"><u>{$lng.lbl_advanced_search}</u></a></td>
</tr>