[shishapipe]

Thanks for that CC, yes you was right

Here is the revised file that works great now.
shopcart/skin1/modules/stock_notify/stocknotify.tpl

{* stocknotify.tpl funkydunk.net 2003 - changed by Maxking *}
{capture name=dialog}
{if ($login ne "") or ($guestlogged ne "")}
{include file="modules/stock_notify/addedtolist.tpl"}
{else}
{include file="check_email_script.tpl"}
{include file="check_required_fields_js.tpl"}
{$lng.txt_addme_notify}
<SCRIPT type="text/javascript" language="JavaScript 1.2"> 
var requiredFields = new Array(); 
requiredFields[0] = new Array('guestemail', "{$lng.lbl_send_your_email|strip_tags|replace:'"':'\"'}", false); 
</SCRIPT> 
<TABLE border="0"> 
<FORM action="notify.php" method="post" name="notify"> 
<INPUT type="hidden" name="mode" value="notify"> 
<INPUT type="hidden" name="productid" value="{$productid}"> 
<TR>
<TD class="FormButton">{$lng.lbl_send_your_email}:</TD> 
<TD><FONT class="Star">*</FONT></TD> 
<TD><INPUT value"Enter Your Email" id="guestemail" type="text" size="45" name="guestemail" onchange="javascript: checkEmailAddress(this);"></TD>
</TR> 
</FORM> 
</TABLE> 
{include file="buttons/submit.tpl" style="button" button_title=$lng.lbl_stock_notify_button href="javascript: if(checkRequired('')) document.notify.submit();"}
{/if}
{/capture} 
{include file="dialog.tpl" title=$lng.lbl_stock_notify content=$smarty.capture.dialog extra="width=100%"}