Joomla 1.5 with Virtuemart 1.1.9 - php

Question

I want add changing on category page, I customize page websitelink.com/components\com_virtuemart\themes\default\templates\browse\browse_3.php
I add code
<div class="addtocart_buttonList">
<?php
$button_lbl = $VM_LANG->_('PHPSHOP_CART_ADD_TO');
$button_cls = 'addtocart_button';
if( CHECK_STOCK == '1' && ( $product_in_stock < 1 ) ) {
$button_lbl = $VM_LANG->_('VM_CART_NOTIFY');
$button_cls = 'notify_button';
$notify = true;
} else {
$notify = false;
}
?>
<form action="<?php echo $mm_action_url ?>index.php" method="post" name="addtocart" id="addtocart<?php echo $i ?>" class="addtocart_form" <?php if( $this->get_cfg( 'useAjaxCartActions', 1 ) && !$notify ) { echo 'onsubmit="handleAddToCart( this.id );return false;"'; } ?>>
<input type="submit" class="<?php echo $button_cls ?>" value="<?php echo $button_lbl ?>" title="<?php echo $button_lbl ?>" />
<input type="hidden" name="category_id" value="<?php echo #$_REQUEST['category_id'] ?>" />
<input type="hidden" name="product_id" value="<?php echo $product_id ?>" />
<input type="hidden" name="prod_id[]" value="<?php echo $product_id ?>" />
<input type="hidden" name="page" value="shop.cart" />
<input type="hidden" name="func" value="cartadd" />
<input type="hidden" name="Itemid" value="<?php echo $sess->getShopItemid() ?>" />
<input type="hidden" name="option" value="com_virtuemart" />
<input type="hidden" name="set_price[]" value="" />
<input type="hidden" name="adjust_price[]" value="" />
<input type="hidden" name="master_product[]" value="" />
</form>
</div>
After adding this line add to cart button appear on list items, but than i click on add to cart button error will come
Please enter a valid quatity for this item
How i can solve this?

Answer 1

You need to specify a quantity as an input field, hidden or otherwise. We only wanted the customer to be able to order one of an item, so added this code:
<input type="hidden" value="1" name="quantity">
Having that named input field satisifed the Virtuemart validation.