Sub-Category list elements don't appear in alphabetical order

[Chrisj]

This Form works successfully, however, the Sub-Category list elements don't appear in alphabetical order, even though I entered them into this script's siteAdmin sub-category-input in alphabetical order. Is there a line of code that could direct the elements to appear in alphabetically order upon selecting the drop-down choices? Or other solution? Here's the Form code:

<form enctype="multipart/form-data" action="uploader.php" method="POST">
<div id="upload-video">
<ul>
<li style="width:240px; text-align:right;"><strong>[var.lang_title]:</strong></li>
<li style="width:400px; text-align:left;"><input name="title" type="text" class="upload-video-form-input" value="[var.title]" size="38" />
</li>

<li style="width:240px; text-align:right;"><strong>[var.lang_description]:</strong><br /></li>
<li style="width:400px; text-align:left;"><textarea rows="4" name="description" id="description" cols="29" class="upload-video-form-input">[var.description]</textarea><br />
</li>

<li style="width:240px; text-align:right;"><strong>[var.lang_tags]:</strong></li>
<li style="width:400px; text-align:left;"><input name="tags" type="text" class="upload-video-form-input" value="[var.tags]" size="38" />
</li>

<input type="hidden" name="channel" value="9"/>
<li style="width:240px; text-align:right"><strong>Sub-Category: </strong></li>
<li style="width:450px; text-align:left;" ><select class="upload-video-form-input" id="sub_change" size="1" name="sub_cat"></select>
</li>
</ul>
<input type="hidden" name="vid_upload_token" value="[var.vid_upload_token]" />

<table id="tab1">
<tbody>
<tr>
<td>
<input type="hidden" name="public_private" value="public"></li>
<input class="buttonform1" type="submit" value="UPLOAD" />
</td></tr>
</tbody>
</table>

<input class="upload-video-form-input" type="hidden" name="form_submitted" value="yes" />
</form>
<script>javascript:ahahscript.ahah('[var.base_url]/uploader.php?sub_cat=1', 'sub_change', '', 'GET', '', this); </script>

Any guidance/remedy will be appreciated.