Кнопка submit вне формы

	<button class="addToCart" form="myForm" type="submit" name="submit-button" value="$1.05">PRICE 1</button>

<form id="myForm" method="post" action="">
    <input type="hidden" name="item-id" value="" />
    <input type="submit" name="add-button" />
</form>