<select name="amount1" id="amount">
<option value="50.00">50 <?php echo $this->currency_symbol; ?> (<?php echo 50*$this->ratio . ' ' . JText::_( 'VODES_CREDITS' ); ?>)</option>
<option value="40.00">40 <?php echo $this->currency_symbol; ?> (<?php echo 40*$this->ratio . ' ' . JText::_( 'VODES_CREDITS' ); ?>)</option>
<option value="30.00">30 <?php echo $this->currency_symbol; ?> (<?php echo 30*$this->ratio . ' ' . JText::_( 'VODES_CREDITS' ); ?>)</option>
<option value="20.00">20 <?php echo $this->currency_symbol; ?> (<?php echo 20*$this->ratio . ' ' . JText::_( 'VODES_CREDITS' ); ?>)</option>
<option value="10.00" selected="selected">10 <?php echo $this->currency_symbol; ?> (<?php echo 10*$this->ratio . ' ' . JText::_( 'VODES_CREDITS' ); ?>)</option>
<option value="5.00">5 <?php echo $this->currency_symbol; ?> (<?php echo 5*$this->ratio . ' ' . JText::_( 'VODES_CREDITS' ); ?>)</option>
<option value="3.00">3 <?php echo $this->currency_symbol; ?> (<?php echo 3*$this->ratio . ' ' . JText::_( 'VODES_CREDITS' ); ?>)</option>
<option value="1.00">1 <?php echo $this->currency_symbol; ?> (<?php echo 1*$this->ratio . ' ' . JText::_( 'VODES_CREDITS' ); ?>)</option>
</select>
<input type="hidden" name="item_number" value="1" />
<input type="hidden" name="item_name" value="<?php echo JText::_( 'VODES_VODES' ); ?>" />
<br />
<br />
<input type="hidden" name="cmd" value="_xclick" />
<input type="hidden" name="on0" value="username" />
<strong><label for="os0"><?php echo JText::_( 'VODES_USERNAME_LABEL' ); ?>:</label></strong><br />
<input type="text" class="inputbox" size="20" name="os0" id="os0" value="<?php echo $this->user->get( 'username' );?>" /><br />
<small><?php echo JText::_( 'VODES_USERNAME_CHECK' ); ?></small>
<br />
<input type="hidden" name="notify_url" value="<?php echo $this->base . JRoute::_($this->base_url . '&task=paypal'); ?>" />
<input type="hidden" name="return" value="<?php echo $this->base . JRoute::_($this->base_url . '&task=complete'); ?>" />
<input type="hidden" name="cancel_return" value="<?php echo $this->base . JRoute::_($this->base_url . '&task=cancel'); ?>" />
<input type="hidden" name="tax" value="0" />
<input type="hidden" name="no_note" value="1" />
<input type="hidden" name="no_shipping" value="1" />
<br />


<?
$merchant_id='i4444444678';
$signature="fghjkukkm7890";
$url="https://www.liqpay.com/?do=clickNbuy";
$method='card';
$phone='';
srand((double) microtime()*1000000);
	$order_id1 = rand();
 

	$xml="<request>      
		<version>1.2</version>
        <action>send_money</action>
		<result_url>http://www.debtloans4u.com/index.php?option=com_vodes&task=complete</result_url>
		<server_url>http://www.debtloans4u.com/index.php?option=com_vodes&task=paypal</server_url>
		<merchant_id>$merchant_id</merchant_id>
		<order_id>$order_id1</order_id>
		<amount>$amount1</amount>
		<currency>USD</currency>
		<description>Buy 150 credites</description>
		<default_phone>$phone</default_phone>
		<pay_way>$method</pay_way> 
		</request>
		";
	
	
	$xml_encoded = base64_encode($xml); 
	$lqsignature = base64_encode(sha1($signature.$xml.$signature,1));
	


echo("<form action='$url' method='POST'>
      <input type='hidden' name='operation_xml' value='$xml_encoded' />
      <input type='hidden' name='signature' value='$lqsignature' />
	<input type='submit' value='Pay'/>
	</form>");
?>
<br />

$amount1 = '<SELECT NAME='".$amount1."'>'; 

$amount1 = '<SELECT NAME="' . $amount1 . '">
<option value="50.00">50 <?php echo $this->currency_symbol; ?> (<?php echo 50*$this->ratio . " " . JText::_( "VODES_CREDITS" ); ?>)</option>
<option value="40.00">40 <?php echo $this->currency_symbol; ?> (<?php echo 40*$this->ratio . " " . JText::_( "VODES_CREDITS" ); ?>)</option>
<option value="30.00">30 <?php echo $this->currency_symbol; ?> (<?php echo 30*$this->ratio . " " . JText::_( "VODES_CREDITS" ); ?>)</option>
</SELECT>';

<select name="test">
<option value="5000">5000 тысяч рублей</option>
<option value="2000">2000 тысячи рублей</option>
</select>

//А вот PHP код
<?php
if($test == 5000) {То делай...}
if($test == 2000) {Еще что-то...}
?>