Javascript - How to change a new value on drop down - php

Question

When we change the name="quantity" and the $product['price'] value will changing too. Here will have dynamic quantity and price. How to do that using jquery/javascript.
<?php
$select = "SELECT * FROM `products` ORDER BY `id` DESC LIMIT 10";
$query = mysql_query($select) or die(mysql_error());
?>
<ul>
<?php while($product = mysql_fetch_array($query)) { ?>
<li>
<p><?php echo $product['name'];?></p>
<p> Quantity
<select name="quantity">
<?php for($i=1;$i<=$product['quantity'];$i++) { ?>
<option value="<?php echo $i; ?>"><?php echo $i; ?></option>
<?php } ?>
</select>
</p>
<p><?php echo $product['price'];?></p>
</li>
<?php } ?>
</ul>
Let me know :)

Answer 1

Using jQuery:
$(document).ready(function() {
$("#quantity_select").bind("change", function() {
selected_option = $("option:selected").val();
$("#counter").html(selected_option);
});
});
...
<select id="quantity_select">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select>
<div id="counter"></div>
You can use text() instead of val() if you want to see actual text instead of value attribute .