bit of php help (making a text field required)

[subzero]

Hi i have a text field in my presta shop i want to make necessary for users to enter data into it.
Here is the php:


<form action="{$base_dir}order-detail.php" method="post" class="std" id="sendOrderMessage">

{l s='Add a message:'}

{l s='Please Type In Your Purchase Order Number....'}

<textarea cols="67" rows="3" name="msgText"></textarea>

<input type="hidden" name="id_order" value="{$order->id|intval}" />
<input type="submit" class="button" name="submitMessage" value="{l s='Send'}"/>

</form>


Thank you.

[Patric]

Where does this field appear ?

[subzero]

It appears instead of the comment box on checkout. (I modded it to my own specification)