jQuery克隆下拉列表

Question

Hi i have following scenario of drop down list

Whenever i select cat1 options, sub cat 1 options will be populated. But if i add another category it should only add cat1 options not along with sub cat options.But in my case both of cat 1 and sub cat options are loaded. Following are my code to clone drop down list.

        <div class="new-categories">
                    <div class="new-category">
                        <select class="category-select" name="categories">
                        <option></option>
                        <option value="1">cat 1</option>

                    </select>
                    <select class='category-select-sub' style="display:none">
                        <!-- loaded from ajax -->
                    </select>
        </div></div>
    <a href="#" class="add-another-cat smallest" style="">Add another category</a>


$('.add-another-cat').click(function(event){
             event.preventDefault();
             var $orDiv = $('.new-category:last').after($('.new-category:first').clone());

});

This is how i actually supposed to look like

Thanks.

update: populate ajax result

 $('div.new-categories').on('change', 'select.category-select', function () { 
             var $newselect = $('<select />').addClass('category-select-sub');
    $(this).parent().append($newselect);
            var cat_id = $(this).val();
            $.ajax({
                url:baseUrl+'categories/getsubcat',
                data:{'id':cat_id},
                dataType:'json',
                async:false,
                type:'POST',
                success:function(data){
                    var subhtml = data;
                    $('.category-select-sub').show();
                    $('.category-select-sub').html(subhtml);
                }
            });
        });

Once new cat list has been added and an option is selected, the first sub cat are changing according to new list. How to prevent this?

Answer 1

http://jsfiddle.net/SCArr

<script src="//code.jquery.com/jquery-latest.js"></script>
<div id="clone" class="new-category" style="display:none;">
    <select class="category-select" name="categories">
    <option></option>
    <option value="1">cat 1</option>

    </select>
    <select class='category-select-sub' style="display:none">
        <!-- loaded from ajax -->
    </select>
</div>
<div class="new-categories">
</div>
<a href="#" class="add-another-cat smallest" style="">Add another category</a>

<script>
$('.add-another-cat').click(function(event){
    event.preventDefault();
    var $orDiv = $('.new-category:last').after($('#clone').clone().removeAttr('id').show());
});
$('.new-categories').html($('#clone').clone().removeAttr('id').show());
</script>