Someone

function calculatePrice()
{
        var total = 0;

        if(document.pizza.field05.value == "Small")
                total = 13.35;

        if(document.pizza.field05.value == "Medium")
                total = 17.50;

        if(document.pizza.field05.value == "Large")
                total = 22.00;

        for(var i=0; i<6; i++)
        {
                if(document.pizza.field10s[i].checked == true)
                        total += 1.25;

                if(document.pizza.field10d[i].checked == true)
                        total+= 1.96;
        }

        document.pizza.field07.value = total;
}