Requery Drop Down after new record added

Question

Hi,
I have a form built with ADDT. There is a dropdown box tied to the buyers table (ID, Name) and a button to add new buyers. The buyers table has full contact info in it so I can't use the editable drop down. I need to be able to requery the drop down box after the user clicks the add buyer button, which opens a window with the add buyer form, so that it checks the table again and shows the new buyer in the drop down list.
At the moment I have it all working except that when the user adds a new buyer they have to refresh the page, losing any data already entered, in order to see the newly entered data in the drop down. Is there a way to requery the drop down after a new record has been entered or when the user clicks the submit button of the add buyer form? Or, maybe requery when the user clicks on the control again after entering the new buyer?
Any help is much appreciated,
Tony

Answer 1

Thanks again Gunter,
Sorry, I've been out for a few days. I ended up solving the problem by adding a preform search form to search for the buyers in the table before hitting the form. If the buyer isn't there it's added before going to the form. Works for me.
I do have another question about a javascript I've been trying to get working on the same form. It converts numbers in one field to words in another (http://javascript.about.com/library/bltoword.htm) and looks fairly simple, but I think the way ADDT creates the fields names I can't figure out how to make it work. I was able to get it to work on a simple html form, but not the ADDT form. Here's some code with the two fields and the button that calls the javascript. Below that is the call in the head section. The link is also there, but I don't need to post it.
I know this can work but I really could use some help.
Thanks for any help
<td class="KT_th"><label for="guarantee_<?php echo $cnt1; ?>">Guarantee:</label></td>
<td><input type="text" name="guarantee_<?php echo $cnt1; ?>" id="guarantee_<?php echo $cnt1; ?>" value="<?php echo KT_escapeAttribute($row_rscontracts['guarantee']); ?>" size="10"/>
<?php echo $tNGs->displayFieldHint("guarantee");?> <?php echo $tNGs->displayFieldError("contracts", "guarantee", $cnt1); ?>
<label>
<input type="button" onclick="form1.price_text_1.value = toWords(form1.guarantee_1.value);" value="Convert to Text" />
</label></td>
<td width="106" class="KT_th"><label for="foreign_exchange_<?php echo $cnt1; ?>">Curreny:</label></td>
<td width="150"><select name="foreign_exchange_<?php echo $cnt1; ?>" id="foreign_exchange_<?php echo $cnt1; ?>">
<option value=""><?php echo NXT_getResource("Select one..."); ?></option>
<?php
do {
?>
<tr>
<td width="109" valign="top" class="KT_th">Price Text:</td>
<td width="197" valign="top"><span class="KT_th">
<textarea name="price_text_<?php echo $cnt1; ?>" cols="32" id="price_text_<?php echo $cnt1; ?>"><?php echo KT_escapeAttribute($row_rscontracts['price_text']); ?></textarea>
</span></td>
This is in the head section:
<script language="JavaScript" type="text/javascript">
<!--
// Call num to words script
var words = toWords(num);
//-->
</script>