分页

//生成Pager，当前页码, 总页数, 回调function
        $.fn.pager = function(page, total, callback) {
            var html = '';
            html += '<a class="first" href="javascript:;">首页</a>';
            html += '<a class="first" href="javascript:;">上一页</a>';
            var start = page - 5 < 0 ? 0 : page - 5;
            var end = page + 5 < total ? page + 5 : total;
            for (var i = start; i < end; i++) {
                html += i == page - 1 ? '<span>' + (i + 1) + '</span>' : '<a href="javascript:;">' + (i + 1) + '</a>';
            }
            html += '<a class="first" href="javascript:;">下一页</a>';
            html += '<a class="last" href="javascript:;">末页</a>';
            $(this).html(html).find('a').click(function() {
                var p = $(this).text();
                if (p == '上一页') p = page == 1 ? 1 : page - 1;
                if (p == '下一页') p = page == total ? total : page + 1;
                if (p == '首页') p = 1;
                if (p == '末页') p = total;

                if (p != page) callback(parseInt(p));
            });
        }

        onload = function() {
            //用用回调
            function go(p) {
                $('.pager').pager(p, 82, go);
            }

            $('.pager').pager(1, 82, go);
        }
    </script>