复制代码 代码如下:

<script type=\"text/javascript\">
            var pageSize = 15;    //每页显示的记录条数
             var curPage=0;        //当前页
             var lastPage;        //最后页
             var direct=0;        //方向
            var len;            //总行数
            var page;            //总页数
            var begin;
            var end;

               
            $(document).ready(function display(){  
                len =$(\"#mytable tr\").length - 1;    // 求这个表的总行数，剔除第一行介绍
                page=len % pageSize==0 ? len/pageSize : Math.floor(len/pageSize)+1;//根据记录条数，计算页数
                // alert(\"page===\"+page);
                curPage=1;    // 设置当前为第一页
                displayPage(1);//显示第一页

                document.getElementById(\"btn0\").innerHTML=\"当前 \" + curPage + \"/\" + page + \" 页    每页 \";    // 显示当前多少页
                document.getElementById(\"sjzl\").innerHTML=\"数据总量 \" + len + \"\";        // 显示数据量
                document.getElementById(\"pageSize\").value = pageSize;

               

                $(\"#btn1\").click(function firstPage(){    // 首页
                    curPage=1;
                    direct = 0;
                    displayPage();
                });
                $(\"#btn2\").click(function frontPage(){    // 上一页
                    direct=-1;
                    displayPage();
                });
                $(\"#btn3\").click(function nextPage(){    // 下一页
                    direct=1;
                    displayPage();
                });
                $(\"#btn4\").click(function lastPage(){    // 尾页
                    curPage=page;
                    direct = 0;
                    displayPage();
                });
                $(\"#btn5\").click(function changePage(){    // 转页
                    curPage=document.getElementById(\"changePage\").value * 1;
                    if (!/^[1-9]\\d*$/.test(curPage)) {
                        alert(\"请输入正整数\");
                        return ;
                    }
                    if (curPage > page) {
                        alert(\"超出数据页面\");
                        return ;
                    }
                    direct = 0;
                    displayPage();
                });

               
                $(\"#pageSizeSet\").click(function setPageSize(){    // 设置每页显示多少条记录
                    pageSize = document.getElementById(\"pageSize\").value;    //每页显示的记录条数
                    if (!/^[1-9]\\d*$/.test(pageSize)) {
                        alert(\"请输入正整数\");
                        return ;
                    }
                    len =$(\"#mytable tr\").length - 1;
                    page=len % pageSize==0 ? len/pageSize : Math.floor(len/pageSize)+1;//根据记录条数，计算页数
                    curPage=1;        //当前页
                     direct=0;        //方向
                     firstPage();
                });
            });

            function displayPage(){
                if(curPage <=1 && direct==-1){
                    direct=0;
                    alert(\"已经是第一页了\");
                    return;
                } else if (curPage >= page && direct==1) {
                    direct=0;
                    alert(\"已经是最后一页了\");
                    return ;
                }

                lastPage = curPage;

                // 修复当len=1时，curPage计算得0的bug
                if (len > pageSize) {
                    curPage = ((curPage + direct + len) % len);
                } else {
                    curPage = 1;
                }

               
                document.getElementById(\"btn0\").innerHTML=\"当前 \" + curPage + \"/\" + page + \" 页    每页 \";        // 显示当前多少页

                begin=(curPage-1)*pageSize + 1;// 起始记录号
                end = begin + 1*pageSize - 1;    // 末尾记录号

               
                if(end > len ) end=len;
                $(\"#mytable tr\").hide();    // 首先，设置这行为隐藏
                $(\"#mytable tr\").each(function(i){    // 然后，通过条件判断决定本行是否恢复显示
                    if((i>=begin && i<=end) || i==0 )//显示begin<=x<=end的记录
                        $(this).show();
                });