ทำไม ใส่กับไม่ใส่ script auto submit แล้ว action ไปคนละหน้ากันครับ

<form name="paypal_send_data" action="test_payments.php" method="post">
    <script>
        document.paypal_send_data.submit();
    </script>

    <input type="hidden" name="cmd" value="_xclick"> 		
    <input type="hidden" name="no_note" value="1"> 		
    <input name="lc" type="hidden" value="US">                
    <input name="currency_code" type="hidden" value="USD"> 		
    <input type="hidden" name="bn" value="PP-BuyNowBF:btn_buynow_LG.gif:NonHostedGuest"> 		
    <input name="first_name" type="hidden" value="Customers First Name"> 		
    <input name="last_name" type="hidden" value="Customers Last Name"> 		
    <input type="hidden" name="amount" value="100.00">  		
    <input type="hidden" name="item_name" value="item_name"> 		
    <input type="hidden" name="custom" value=""> 		
    <input name="item_number" type="hidden" value="1234567890"> 
    <input name="submit" type="submit" value="" class="gotocheckoutbutton" border="0"> 
</form>

<form name="paypal_send_data" action="test_payments.php" method="post">
    <input type="hidden" name="cmd" value="_xclick"> 		
    <input type="hidden" name="no_note" value="1"> 		
    <input name="lc" type="hidden" value="US">                
    <input name="currency_code" type="hidden" value="USD"> 		
    <input type="hidden" name="bn" value="PP-BuyNowBF:btn_buynow_LG.gif:NonHostedGuest"> 		
    <input name="first_name" type="hidden" value="Customers First Name"> 		
    <input name="last_name" type="hidden" value="Customers Last Name"> 		
    <input type="hidden" name="amount" value="100.00">  		
    <input type="hidden" name="item_name" value="item_name"> 		
    <input type="hidden" name="custom" value=""> 		
    <input name="item_number" type="hidden" value="1234567890"> 
    <input name="submit" type="submit" value="" class="gotocheckoutbutton" border="0"> 
</form>

<?php

// PayPal settings
$paypal_email = '[email protected]';
$return_url = 'http://xxx.com/index.php';
$cancel_url = 'http://xxx.com/index.php';
$notify_url = 'http://xxx.com/payments.php';



	// Firstly Append paypal account to querystring
	$querystring .= "?business=".urlencode($paypal_email)."&";	
	
	// Append amount& currency (£) to quersytring so it cannot be edited in html
	
	//The item name and amount can be brought in dynamically by querying the $_POST['item_number'] variable.
	$querystring .= "item_name=".urlencode($item_name)."&";
	$querystring .= "amount=".urlencode($item_amount)."&";
	
	//loop for posted values and append to querystring
	foreach($_POST as $key => $value){
		$value = urlencode(stripslashes($value));
		$querystring .= "$key=$value&";
	}
	
	// Append paypal return addresses
	$querystring .= "return=".urlencode(stripslashes($return_url))."&";
	$querystring .= "cancel_return=".urlencode(stripslashes($cancel_url))."&";
	$querystring .= "notify_url=".urlencode($notify_url);
	
	// Append querystring with custom field
	//$querystring .= "&custom=".USERID;
	
	// Redirect to paypal IPN
	header('location:https://www.paypal.com/cgi-bin/webscr'.$querystring);
	exit();

?>