$(document).ready(function() { 
    $("form").find("select").each(function(){
        var id = $(this).attr('id').replace(/product-list-/g,'');
        if ($('#product-list-'+id)) {
            var url = '/gl/?product_sort_name='
            +$('#product-sort-name-'+id).val()
            +'&product_category='
            +$('#product-category-'+id).val()
            +'&product_materials_info='
            +$('#product-materials-info-'+id).val()
            +'&product_processed_info='
            +$('#product-processed-info-'+id).val();
            $.getJSON(
                url,
                function(data) {
                    $.each(data, function(i,item){
                        if (item) {
                            $('#product-list-'+id).append('<option value="'+item['product_code']+'">'+item['product_normal_price']+'円-'+item['product_name']+'</option>');
                        }
                    });
                });
        }
        });
});