<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();                 });              }     </script>

<a id="btn0"></a> <input id="pageSize" type="text" size="1" maxlength="2" value="getDefaultValue()"/><a> 条 </a> <a href="#" id="pageSizeSet">设置</a>  <a id="sjzl"></a>  <a  href="#" id="btn1">首页</a> <a  href="#" id="btn2">上一页</a> <a  href="#" id="btn3">下一页</a> <a  href="#" id="btn4">尾页</a>  <a>转到 </a> <input id="changePage" type="text" size="1" maxlength="4"/> <a>页 </a> <a  href="#" id="btn5">跳转</a> <table id="mytable" align="center"> ...剩余的table代码