Your Magento product ordering might seem a long process to some
business owners, so we thought of making it simple, so that users can
directly enter the quantity in the products listing area and click on
ADD TO CART and checkout.
So, here is how you can do that.
Goto /app/design/frontend/default/your-theme/template/catalog/product/list.phtml
Open the file on a code editor and find this line,
<button type="button" title="<?php echo $this->__('Add to Cart') ?>" onClick="setLocation('<?php echo $this->getAddToCartUrl($_product) ?>')"><span><span><?php echo $this->__('Add to Cart') ?></span></span></button>
Just replace it with,
<form action="<?php echo $this->getAddToCartUrl($_product) ?>" method="post" id="product_addtocart_form_<?php echo $_product->getId()?>"<?php if($_product->getOptions()): ?> enctype="multipart/form-data"<?php endif; ?>>
<?php if(!$_product->isGrouped()): ?>
<label for="qty"><?php echo $this->__('Qty') ?>:</label>
<input type="text" name="qty" id="qty" maxlength="12" value="<?php echo ($this->getMinimalQty($_product)?$this->getMinimalQty($_product):1) ?>" />
<?php endif; ?>
<button type="button" onClick="this.form.submit()"><span><span><span><?php echo $this->__('Add to Cart') ?></span></span></span></button>
</form>