jquery implementation of pager control example_jquery

$.fn.extend({ JPager: function (cfg, pageIndex, pageSize) {
    if (cfg && pageIndex > 0 && pageSize>0) {
        var token = "#" this.attr("id");
        this.empty();
        var pageFirst = function () {
            $(token).JPager(cfg, 1, pageSize);
        };

        var pagePre = function () {
            $(token).JPager(cfg, pageIndex - 1, pageSize);
        };

        var pageLast = function () {
            $(token).JPager(cfg, parseInt($("#_tot").val()), pageSize);
        };

        var pageNext = function () {
            $(token).JPager(cfg, pageIndex 1, pageSize);
        };

        var pageNumber = function () {
            $(token).JPager(cfg, parseInt($(this).text()), pageSize);
        };

        var pageGo = function () {
            var index = parseInt($("#_pos").val());
            var total = parseInt($("#_tot").val());
            if (index) {
                if (index > total) {
                    $(token).JPager(cfg, total, pageSize);
                }
                else if (index < 1) {
                    $(token).JPager(cfg, 1, pageSize);
                }
                else {
                    $(token).JPager(cfg, index, pageSize);
                }
            }
        };
        var checkGoNumber = function () {
            if (!Number(this.value)) {
                this.value = "";
            }
            else {
                this.value = Number(this.value);
            }
        };
        var initCustomer = function (recordCount) {
            if (cfg.customer) {
                if (cfg.customer.template) {
                    var t = cfg.customer.template;
                    t = t.replace(/%total%/gi, Math.ceil(recordCount / pageSize)).replace(/%current%/gi, pageIndex).replace(/%recordCount%/gi, recordCount).replace(/%pageSize%/gi, pageSize);
                    if (cfg.customer.position == "right") {
                        $("#_right").after(t);
                    }
                    else {
                        $("#_left").before(t);
                    }
                }
            }
        };

        var changeState = function (total) {
            if (pageIndex == 1) {
                $("#_first").attr("class", "unable");
                $("#_pre").attr("class", "unable");
            }
            else {
                $("#_first").bind("click", pageFirst).attr("class", "number");
                $("#_pre").bind("click", pagePre).attr("class", "number");
            }
            if (pageIndex == total) {
                $("#_last").attr("class", "unable");
                $("#_next").attr("class", "unable");
            }
            else {
                $("#_last").bind("click", pageLast).attr("class", "number");
                $("#_next").bind("click", pageNext).attr("class", "number");
            }
        };
        var initNumber = function (total, count, current) {
            if (total > 0 && count > 0) {
                if (current < 1) {
                    current = 1;
                }
                if (current > total) {
                    current = total;
                }
                var endIndex = total;
                var startIndex = 1;
                var temp = current Math.floor(count / 2);
                if (temp < total) {
                    if (temp < count) {
                        endIndex = count;
                    }
                    else {
                        startIndex = temp - count 1;
                        endIndex = temp;
                    }
                }
                else {
                    if (total > count) {
                        startIndex = total - count 1;
                    }
                }
                $("#_number").empty();
                for (var i = startIndex; i <= endIndex; i ) {
                    var html = $("").text(i).bind("click", pageNumber);
                    if (i == current) {
                        $("#_number").append(html.attr("class", "selected"));
                    }
                    else {
                        $("#_number").append(html.attr("class", "number"));
                    }
                }
            }
        };

        var initPager = function (data) {
            if ($.isArray(data.SearchResult) && data.RecordCount > 0) {
                $(token).append("首页 上一页  下一页 末页");
                var total = Math.ceil(data.RecordCount / pageSize);
                $("#_tot").val(total);
                $("#_pos").bind("blur", checkGoNumber);
                $("#_to").bind("click", pageGo);

                changeState(total);
                if (cfg.showNumber && cfg.count > 0) {
                    initNumber(total, cfg.count, pageIndex);
                }
                initCustomer(data.RecordCount);
            }
        };

        if (cfg.action) {
            if (cfg.action.url && cfg.action.data) {
                var d = cfg.action.data.substr(0, cfg.action.data.lastIndexOf("}")) ',"pageIndex":' pageIndex ',"pageSize":' pageSize "}";
                if (cfg.action.callback && $.isFunction(cfg.action.callback)) {
                    $.ajax({
                        type: "post",
                        url: cfg.action.url,
                        dataType: "json",
                        contentType: "text/json",
                        data: d,
                        success: function (data) {
                            initPager(data.d);
                            cfg.action.callback(data.d);
                        }
                    });
                }
                                                                          url: cfg.action.url,
dataType: "json",
contentType: "text/ json",
data: d,
success: function (data) {
initPager(data.d);
                }
                       ); > }
}
}
});



css:

color: #BCC0BB;
}
.number
{
margin: 2px;
color:# 0000FF;
text-decoration:underline;
}
.selected
{
margin: 2px;
color: #FF0000;
font-weight: bold;
}



html: