$(document).ready(function() {
    $("select#search_category").change(function() {
        var categoryId = $("#search_category > option:selected").attr("value");

        $.ajax({
            type: "GET",
            contentType: "application/json; charset=utf-8",
            url: "/FindSubCategory/" + categoryId,
            data: "{}",
            dataType: "json",
            success: function(data) {
                if (data.length > 0) {
                    var options = '';
                    for (p in data) {
                        var subCategory = data[p];
                        options += "<option value='" + subCategory.Value + "'>" + subCategory.Text + "</option>";
                    }
                    $("#search_subcategory").removeAttr('disabled').html(options);

                } else {
                    $("#search_subcategory").attr('disabled', true).html('');
                }
            }
        });
    });
});