Good day, I can not find the problem with 'add in basket'

Good day, I can not find the problem with 'add in basket'

When i click add to basket at product list, it works and i go to the basket page.
But when i choose a product (with description) and click to add, web site just refresh currient page.
where i can't find a problem ?? jquery ?

kokvilna.lv/index.php?option=com_jshopping&controller=product&task=view&category_id=12&product_id=53

hope for help

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Aw: Good day, I can not find the problem with 'add in basket'

test login?

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Aw: Good day, I can not find the problem with 'add in basket'

Pirkt = buy

Aw: Good day, I can not find the problem with 'add in basket'

<input id="quantity" class="inputbox" type="hidden" value="" onkeyup="reloadPrices();" name="quantity">

chnage to

<input id="quantity" class="inputbox" type="hidden" value="1" onkeyup="reloadPrices();" name="quantity">

Aw: Good day, I can not find the problem with 'add in basket'

Now it works !! Thz a lot !

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