Edit in JSFiddle

var result = 0;
result = posts.response.total_posts / 5;

if (result & lt; = 1) {
    $('.liveblog_nav').remove();
} else {
    $('.liveblog_nav_pages').nextAll().remove();

    var nav = '';
    if (currentpage != 1) {
        nav += '<div class="navright"><a href="?tumblrpage=' + (+currentpage - 1) + '">Newer »</a></div>';
    }
    if (currentpage != Math.ceil(result)) {
        nav += '<div class="navleft"><a href="?tumblrpage=' + (+currentpage + 1) + '">« Older</a></div>';
    }
}
$('.liveblog_nav').html(nav);