<?php
$totaal = calculateTotals();
$excl = round($totaal / 1.19, 2);
$btw = $totaal - $excl;
?>

<form name="bestelling-plaatsen" method="post">
    <label>verzendmethode</label>
    <select name="verzendmethode" id="verzendmethode" onChange="recalc()">
        <?php
        // teller starten
        $i = 0; 
        
        // loop uitvoeren
        foreach($zend_opties as $value)
        {
            echo '<option value="'.$verzend_kosten[$i].'">'.$value.'</option>';    
            $i++;
        }
        ?>
    </select>
</form>

<table width="220px">
    <tr><td><strong>Subtotaal</strong></td><td>&euro;<span id="totaal"><?=$totaal?></span></td>
    <tr><td><strong>BTW 19%</strong></td><td>&euro;<span id="btw"><?=$btw?></span></td></tr>
    <tr><td><strong>Excl. 19% BTW</strong></td><td>&euro;<span id="excl"><?=$excl?></span></td></tr>
</table>

<script language="javascript">
function recalc(){
    var totaal    = <?=$totaal?>;
    var btw        = <?=$btw?>;
    var excl    = <?=$excl?>;

    var verz    = document.getElementById('verzendmethode').value;
    
    var newTotaal = parseFloat(totaal) + parseFloat(verz);
    
    document.getElementById('totaal').innerHTML = newTotaal;    
    document.getElementById('excl').innerHTML = (parseFloat(newTotaal) / 1.19);    
    document.getElementById('btw').innerHTML = (parseFloat(newTotaal) - document.getElementById('excl').innerHTML);
}
</script>

<?php
$totaal = calculateTotals();
$excl = round($totaal / 1.19, 2);
$btw = $totaal - $excl;
?>
 
<form name="bestelling-plaatsen" method="post">
	<label>verzendmethode</label>
    <select name="verzendmethode" id="verzendmethode" onChange="recalc()">
    	<?php
		// teller starten
		$i = 0; 
 
		// loop uitvoeren
		foreach($zend_opties as $value)
		{
			echo '<option value="'.$verzend_kosten[$i].'">'.$value.'</option>';	
			$i++;
		}
		?>
    </select>
</form>
 
<table width="220px">
    <tr><td><strong>Subtotaal</strong></td><td>&euro;<span id="totaal"><?=$totaal?></span></td>
    <tr><td><strong>BTW 19%</strong></td><td>&euro;<span id="btw"><?=$btw?></span></td></tr>
    <tr><td><strong>Excl. 19% BTW</strong></td><td>&euro;<span id="excl"><?=$excl?></span></td></tr>
</table>
 
<script language="javascript">
function recalc(){
	var totaal	= <?=$totaal?>;
	var btw		= <?=$btw?>;
	var excl	= <?=$excl?>;
 
	var verz	= document.getElementById('verzendmethode').value;
 
	var newTotaal = parseFloat(totaal) + parseFloat(verz);
 
	document.getElementById('totaal').innerHTML = newTotaal;	
	document.getElementById('excl').innerHTML = (parseFloat(newTotaal) / 1.19);	
	document.getElementById('btw').innerHTML = (parseFloat(newTotaal) - document.getElementById('excl').innerHTML);
}
</script>