<%
       /*----------------------------------------------*/
       //分页类data_grid
       //参数 : pagesize - 每页显示最多记录数 rs_arr - 记录集数组
       /*----------------------------------------------*/
       function data_grid(pagesize,rs_arr) {
              //公共属性
              this.pagesize = pagesize;
              this.rs_arr = rs_arr;
              this.start_pagecount = "";
              this.end_pagecount = "";
              //私有属性
              var count = this.rs_arr.length;
              var page = 0;
              var flag = "";
      
              /*----------------------------------------------*/
              //公共方法:get_page()
              //参数 : 无
              //作用 : 得到当前页并设置当前页
              //返回值:无
              /*----------------------------------------------*/
              this.get_page = function() {              
                     if(is_empty(Request.QueryString("page")) || isNaN(Request.QueryString("page")) || Request.QueryString("page") == "" || parseInt(Request.QueryString("page"))<0)
                            page = 0;
                     else if(parseInt(Request.QueryString("page")) >= myint(count/this.pagesize))
                            page = myint(count/this.pagesize -1);
                     else      
                            page = Request.QueryString("page");
              }

              /*----------------------------------------------*/
              //私有方法:is_empty()
              //参数 : 无
              //作用 : 判断是否捕获到参数
              //返回值:无
              /*----------------------------------------------*/
              var is_empty = function(obj) {
                  return !(String(obj) != "" && String(obj) != "undefined");
                }

              /*----------------------------------------------*/
              //私有方法:myint()
              //参数 : 数值
              //作用 : 得到整数
              //返回值:整数
              /*----------------------------------------------*/
              var myint = function (avalue) {
                     var rvalue;
                     if (avalue > parseInt(avalue))
                            rvalue = parseInt(avalue) + 1;
                     else
                            rvalue = parseInt(avalue);
                     return rvalue;
              }
              
              /*----------------------------------------------*/
              //公共方法:set_pagecount()
              //参数:pagesize - 每页显示最多记录数
              //作用:设置每页显示多少条记录
              //flag = 1   是最后一页
              //flag = 2   是第一页
              //flag = 3    既是第一页,又是最后一页    
              //返回值:此页循环上限
              /*----------------------------------------------*/
              this.set_pagecount = function() {
                     var n,s;
                     this.start_pagecount = parseInt(page) * this.pagesize;
                     //当到了这页的时候还剩余多少条记录
                     s = count - parseInt(page) * this.pagesize;
                     //如何循环?
                     if (parseInt(page) == 0 && s <= this.pagesize) {              // 既是第一页,又是最后一页(也就是只有一页)
                            flag = 3;
                            n = count;
                     } else if(parseInt(page) != 0 && s <= this.pagesize) {   //最后一页
                            flag = 1;
                            n = count;
                     } else {       //第一页
                            flag = 2;
                            n = (parseInt(page)+1) * this.pagesize;
                     }
                     this.end_pagecount =  n;
              }

       /*----------------------------------------------*/
       //公共方法:show_pagelink()
       //参数 : page_name - 页面名称 para - 参数
       //作用 : 显示分页
       //返回值:无
       /*----------------------------------------------*/
       this.show_pagelink = function(page_name,para) {
              if (typeof(para) == "undefined") para = "";
              Response.Write ("<div>");
              Response.Write ("共<font color='red'>" + count + "</font>条 ");
              Response.Write ("共<font color='red'>" + myint(count/this.pagesize) + "</font>页/每页" + this.pagesize + "条 ");
              Response.Write ("当前第<font color='red'>" + (parseInt(page)+1) + "</font>页");
              //显示首页
              if (flag != 3 && parseInt(page) != 0)
                     Response.Write ("  <a href=' " +page_name + "?page=" + 0 + para + " ' >首 页</a>");
              else              
                     Response.Write ("  首 页");

              //显示上一页
              if (parseInt(page)>0)
                     Response.Write ("  <a href=' " +page_name + "?page=" + (parseInt(page)-1) + para + " ' >上一页</a>");
              else
                     Response.Write ("  上一页");

              //显示下一页
              if (flag ==2)
                     Response.Write ("  <a href=' " + page_name + "?page=" + (parseInt(page)+1) + para + " ' >下一页</a>");
              else
                     Response.Write ("  下一页");

              //显示末页
              if (flag != 1 && flag != 3)
                     Response.Write ("  <a href=' " + page_name + "?page=" + myint((count+1)/this.pagesize -1) +para + " ' >末 页</a>");
              else
                     Response.Write ("  末 页");
              
              var begin_page = 0;
              var end_page = myint(count/this.pagesize);
              if(end_page >= 4) {
                     if(parseInt(page) >= 3) {
                            begin_page = parseInt(page) - 2;
                            if (parseInt(page) <= (end_page - 2)) {
                                   end_page = parseInt(page) + 2;
                            }else{
                                   end_page = end_page;
                                   begin_page = end_page - 2;
                            }
                     }else{
                            begin_page = 0;
                            end_page = 4;
                     }
              }
              
              var str_html = "";
              for(var i=begin_page;i<end_page;i++) {
                     if(i == parseInt(page)) {
                            str_html += " <span class=\"pageno\">";
                            str_html += (i+1);
                            str_html += "</span> ";
                     }else{
                            str_html += " <a href=\"" + page_name + "?page="
                            str_html += i;
                            str_html += para;
                            str_html += "\" class=\"page\"> ";
                            str_html += (i+1);
                            str_html +=        "</a> ";
                     }
              }
              
              str_html += "<form method=\"post\" onsubmit=\"document.location = ' ";
              str_html += page_name;
              str_html += "?page='+(page.value-1)+'";
              str_html += para;
              str_html += "';return false;\">";
              str_html += "<input type=\"text\" name=\"page\" size=\"2\" value=\"";
              str_html += (parseInt(page)+1);
              str_html += "\" /></form>";
              Response.Write(str_html);
              Response.Write ("</div>");
       }

}

%>

<!--#Include file="class_database.asp"-->
<!--#Include file="class_data_grid.asp"-->

<%

var database_obj = new database();
//数据库连接
database_obj.connection();
str_sql = "Select CourseID,CourseName,UpdateTime,CommDateTime,Comm,Hit From Course order by UpdateTime Desc";
var tmp_arr = database_obj.query(str_sql);
var data_grid_obj = new data_grid(10,tmp_arr);
data_grid_obj.get_page();
data_grid_obj.set_pagecount();

for(var y=data_grid_obj.start_pagecount;y<data_grid_obj.end_pagecount;y++) {
    Response.Write("CourseID: "+tmp_arr[y][0]+", CourseName: "+tmp_arr[y][1]+ ",UpdateTime: "+tmp_arr[y][2]+"<br />");

}

para = "&keyword=aaa";
data_grid_obj.show_pagelink("view.asp",para);
database_obj.close_database();

%>