[Boofo]

Found a slight mistake. You need to change this line:

<input type="image" border="0" name="imageField" align="absmiddle" src="{imagesfolder}/go.gif"></normalfont></td>

to this:

<input type="image" border="0" name="query" align="absmiddle" src="{imagesfolder}/go.gif"></normalfont></td>

If not, when you type in less than the required amount of characters, you get a not found error instead of the error message that hitting enter will produce.