Support the VirtueMart project and become a member
<form method="post" action="yoursite/?index.php&option=virtumart&view=cart&task=add"><input name="virtuemart_product_id[]" value="22"><input name="quantity[]" value="5"><input name="virtuemart_product_id[]" value="55 "><input name="quantity[]" value="2">....<input type=submit value="submit all"></form>