$(document).ready(function () {
    $("input.addtocartbutton").click(function () {
        var $quanstandard = $(this).parent().children("div.standard").children("input");
        var $quanantimicrobial = $(this).parent().children("div.antimicrobial").children("input");
        
        if ($quanstandard.val().length == 0 && $quanantimicrobial.val().length == 0)
        {
            $quanstandard.val('1');
        }
    });
});