jquery remove/add select options after cloning select list

Question

I need to be able to clone a drop down list and filter only those options that were NOT yet selected in the group of select lists.

For example, having the following:

Answer 1

This seems to do what you want: http://jsfiddle.net/infernalbadger/SKVSu/1/

$('#clone').click(function() {
    var original = $('select.selService:eq(0)');
    var allSelects = $('select.selService');
    var clone = original.clone();

    $('option', clone).filter(function(i) {
        return allSelects.find('option:selected[value="' + $(this).val() + '"]').length;
    }).remove();

    $('#target').append(clone).append('<br />');
});