Form Submission based on PHP IF Statement

I have an html form that I have used javascript and PHP to validate.  I need to submit the results of the form via email to my client, and redirect the user to PayPal for payment.  It is a tournament entry form.

In the process page, I have a section that basically looks for a VALID FORM, and if that condition is met, sends the email to my client, and I need it to process the PayPal form with the variables for payment.  There is no specific "click action" here, so I don't think onclick is the way to go here.  However, my javascript knowledge is weak.

Looking at the code snippet below, how would you get this form to submit if ($valid_form) returns TRUE?

// check if form is valid
	if ($valid_form)
	{
		// create message
		$message = "Name: " . $form['name'] . "\n";
		$message .= "Phone: " . $form['phone'] . "\n";
		$message .= "Address: " . $form['address'] . "\n";
		$message .= "City: " . $form['city'] . "\n";
		$message .= "State: " . $form['state'] . "\n";
		$message .= "Zip Code: " . $form['zipCode'] . "\n";
		$message .= "Email Address: " . $form['email'] . "\n\n";		
		
		$headers = "From: WEST PARK LANES Online Tournament Entry <webmaster@westparklanes.com>\r\n";
		$headers .= "X-Sender: <webmaster@westparklanes.com>\r\n";
		$headers .= "X-Mailer: PHP/". phpversion() ."\r\n";
		$headers .= "Reply-To: " . $form['email'];
		
		// send email
		mail($to, $subject, $message, $headers);
		
		// payPal Redirect
		?>
        <!-- send the PayPal form -->
<form id="scratchShootout" name="scratchShootout" method="post" action="https://www.paypal.com/cgi-bin/webscr">
		<input type="hidden" name="cmd" value="_xclick" />
		<input type="hidden" name="premier" value="darryl.james@drurysouthwest.com" />
		<input type="hidden" name="item_name" value="2011 Scratch Shootout Tournament Entry for <?php echo $_SESSION['name']; ?>" />
		<input type="hidden" name="amount" value="<?php echo $_SESSION['totalAmount']; ?>" />
		<input type="hidden" name="currency_code" value="USD" />
		<input type="hidden" name="lc" value="US" />
		<input type="hidden" name="return" value="http://www.westparklanes.com/subpage.php?content=thankYou/tournamentThankYou" />
		<input type="hidden" name="cancel_return" value="http://www.westparklanes.com" />
		<input type="hidden" name="receiver_email" value="dennis.hacker@offthesheet.com" />
		<input type="hidden" name="no_shipping" value="1" />
		<input type="hidden" name="no_note" value="0" />
		</form>
                
		<?php
	}
	else
	{
		include('includes/onlineEntries/2011scratchShootoutForm.inc.php');
	}

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