JS分页控件，可用于无刷新分页

function PagerBar() {
    this.PageIndex = 1;//页索引，当前页
    this.PageSize = 10;//页面大小
    this.PageCount = 0;//页总数
    this.RecordCount = 0;//记录总数
    this.ReplaceString = "《#PageLink》";//替换页数的文本，注：不可以有正则表达式中的符号
    this.PreviouBarFormat = "";//上一页显示文本格式
    this.NextFormat = ""; //下一页显示文本格式
    this.PageFormat = ""; //页面连接显示文本格式
    this.CurrentPageFormat = ""; //当前页显示文本格式
    this.ShowPagesCount = 5;//显示页数量
    this.GetPageString = function() {//输出HTML代码
        var pagestr = "";
        if (this.RecordCount % this.PageSize == 0) {//计算总也页数
            this.PageCount = parseInt(this.RecordCount / this.PageSize);
        }
        else {
            this.PageCount = parseInt(this.RecordCount / this.PageSize) + 1;
        }
        var regexp = new RegExp(this.ReplaceString, "g");//替换页数文本正则表达式
        if (this.RecordCount > this.PageSize && this.PageIndex != 1) {//上一页HTML输出
            pagestr += this.PreviouBarFormat.replace(regexp, this.PageIndex - 1);
        }
        var ShowPageFirest = this.PageIndex - parseInt(this.ShowPagesCount / 2 + 1) < 0 ? 0 : this.PageIndex - parseInt(this.ShowPagesCount / 2 + 1);//计算显示页数的其实页数
        if (this.PageCount < this.ShowPagesCount) {//当也总数小于显示页数量
            ShowPageFirest = 0;
        }
        else {
            if (this.PageIndex > (this.PageCount - parseInt(this.ShowPagesCount / 2 + 1))) {//当页总数在后几页显示
                ShowPageFirest = this.PageCount - this.ShowPagesCount;
            }
        }
        for (var i = ShowPageFirest; i < ShowPageFirest + this.ShowPagesCount; i++) {//循环出书页数文本
            if (this.PageIndex == i + 1) {
                pagestr += this.CurrentPageFormat.replace(regexp, i + 1);
            }
            else {
                pagestr += this.PageFormat.replace(regexp, i + 1);
            }
            if (i == this.PageCount - 1) {//当到达页总数的时候挑出循环
                break;
            }
        }
        if (this.RecordCount > this.PageSize && this.PageIndex != this.PageCount) {//输出下一页HTMl
            pagestr += this.NextFormat.replace(regexp, this.PageIndex + 1);
        }
        return pagestr;
    }
}