Add to cart button on upsell products in product detail page - Magento 1

<form action="<?php echo $this->getAddToCartUrl($_link) ?>" method="post" id="product_addtocart_form_<?php echo $_link->getId()?>"<?php if($_link->getOptions()): ?> enctype="multipart/form-data"<?php endif; ?>>
	<?php if(!$_link->isGrouped()): ?>
		<input type="text" name="qty" id="qty" maxlength="12" value="<?php echo ($this->getMinimalQty($_link)?$this->getMinimalQty($_link):20) ?>" />
		<label for="qty"><?php echo $this->__('Qty') ?>:</label>
	<?php endif; ?>
	<button type="button" onclick="this.form.submit()"><span><span><span><?php echo $this->__('Add to Cart') ?></span></span></span></button>
</form>