Magento 1.9 I need add qty in category page

My template used ajax card
this code in my category page(list.phtml)

< ?php echo $this->getAddToCartUrl($_product) ?>< ?php else: ?>javascript:void(0)< ?php endif; ?>" class="addtocart" title="< ?php echo $this->__('Add to Cart') ?>" 
< ?php if(Mage::getStoreConfig("ajaxcart/addtocart/enablecategory", $code)):?>onclick="setLocationAjax(this,'< ?php echo $this->getAddToCartUrl($_product) ?>'
,'< ?php echo $_product->getId(); ?>')"< ?php elseif(Mage::getStoreConfig("tnd_settings/category/qty_field", $code)): ?>onclick="document.getElementById('addtocart_form_< ?php echo $_product->getId(); ?>').submit()"< ?php endif; ?>> < ?php echo $this->__('Add to Cart') ?>

A number is added when the user clicks on add to card
i need the user to be able to enter the number of need the product on this page
of course by an number input