twbs modal stacking

gistfile1.txt

    $(document).on('hidden.bs.modal', '.modal', function(e)
    {
        $(this).removeClass('bs-modal-stack');
        $('body').data('bs_open_modals', $('body').data('bs_open_modals') - 1);

        if ($(this).hasClass('is-clone'))
            $(this).remove();
    });

    $(document).on('shown.bs.modal', '.modal', function (e)
    {
        var stack_count = $('body').data('bs_open_modals'),
            new_z       = 0;

        // set initial count
        if (typeof(stack_count) == 'undefined')
            stack_count = 0;

        // if the z-index of this modal has been set, ignore
        if ($(this).hasClass('bs-modal-stack'))
            return;

        // calculate new z-index
        new_z = 1040 + (10 * stack_count);

        // apply to modal
        $(this).addClass('bs-modal-stack').css('z-index', new_z);

        // apply to backdrop
        $('.modal-backdrop')
            .not('.bs-modal-stack')
            .css('z-index', 1040 + (10 * stack_count))
            .addClass('bs-modal-stack');

        // increment stack counter
        $('body').data('bs_open_modals', ++stack_count);
    });