[TYPO3-shop] Problems when form is submitted by javascript

[Joachim Rosskopf]

Hello,

I´m no Typo3/PHP expert, so I tried to do the following to add a 
checkbox in the ###BASKET_PAYMENT_TEMPLATE### part.

<snip>
<tr>
<td colspan=6>
<input type="checkbox" id="agbSelected"><font size="2">
	<b> AGB/ Rückgabebelehrung akzeptieren</b></font>
</td>
</tr>
<tr>
<td colspan=6><img src="clear.gif" width=1 height=10></td>
</tr>
<tr>
<td colspan=6><img src="clear.gif" width=1 height=10></td>
</tr>
</TABLE>
<script tpye="text/javascript">
function checkAgb() {
         var box = document.getElementById("agbSelected");
         if (box == null) {
                 alert("Can´t find checkbox!");
         }
         if (box.checked) {
                 document.forms[0].action='###FORM_URL_THANKS###';
                 document.forms[0].target='###FORM_URL_TARGET###';
                 document.forms[0].submit();
         } else {
                 alert("Achtung: Bevor die Bestellung ...");
         }
}
</script>
<br>
<FORM method="post" action="###FORM_URL###">

<input type="Submit" name="products_update" value="Zurück zum 
Warenkorb">&nbsp;&nbsp;   <input type="Button" name="products_finalize" 
value="Bestellvorgang abschliessen!" onClick="checkAgb();">


</FORM>
</snip>

The code does the right, as far as checking if the checkbox is selected. 
  But when the form is selected I got redirected to the Basket and not 
to the Finalize page.

But where is the difference form my javascript to the Orginal one?
<snip>
<input type="Submit" name="products_update" value="Zurück zum 
Warenkorb">&nbsp;&nbsp;   <input type="Submit" name="products_finalize" 
value="Bestellvorgang abschliessen!" 
onClick="document.forms[0].action='###FORM_URL_THANKS###'; 
document.forms[0].target='###FORM_URL_TARGET###';">
</snip>

Thank you in andvance.
Regards
---
Joachim