$(function() {
    $("#listslide").jcarousel({
        scroll: 1,
        visible: 2
    });

    $("#listslidenav").jcarousel({
        vertical: true,
        scroll: 1,
        visible: 2,     
        itemLastInCallback: removeDivider,
        itemFirstInCallback: addDivider
    });
});

function removeDivider(carousel, item, idx, state)
{
    $(item).addClass("last");

}

function addDivider(carousel, item, idx, state) {
    $(item).removeClass("last");
}