Jquery adding and removing items from listbox

Question

I\'ve created this fiddle, it allows the user to click on either art or video, dynamically populating the the second listbox with the list associated with those selections. Ther

Answer 1

If you want to dynamically add and delete rows seamlessly try this way

http://jsfiddle.net/WX4Nw/

Adding a pointer to the selecteditems list as a data attrib to the root item key will help you control so that you can easily manage add/remove.

Snippet from fiddle:-

$('#SelectBox').change(function () {
        var str = "",
            inHTML = "",
            key = $('#SelectBox').val(),
            items;
        items = $(this).val() == 'art' ? artItems : vidItems;
        $.each(items, function (i, ob) {
            if($('#SelectedItems option[value="' + i + '"][data-key="' + key + '"]').length == 0)
                inHTML += '' + ob + '';
        });
        $("#SelectBox2").empty().append(inHTML);
    });

 $('#add').click(function () {
        var itemsToAdd = [];
        $("#SelectBox2 option:selected").each(function () {
            var optionVal = $(this).val();
            var key = $(this).data('key');
            if ($('#SelectedItems option[value="' + optionVal + '"][data-key="' + key + '"]').length == 0)                     {
                itemsToAdd.push($(this).removeAttr('selected'));
            }
        });
        $("#SelectedItems").append(itemsToAdd);
    });