Jquery simple paging implementation method_jquery

function dolistpage(pagerow,pagenum,rowcount,pagecount){
 $("#pagemsg").html("每页显示"+pagerow+"条，当前" + pagenum + "/" +pagecount + "页 共" +rowcount + "条");
 if (pagenum == 1) {
  $("#fpbtn").attr("disabled", true);
  $("#rpbtn").attr("disabled", true);
 }else {
  $("#fpbtn").removeAttr("disabled");
  $("#rpbtn").removeAttr("disabled");
 }
 if (pagenum == pagecount) {
  $("#npbtn").attr("disabled", true);
  $("#lpbtn").attr("disabled", true);
 }else {
  $("#npbtn").removeAttr("disabled");
  $("#lpbtn").removeAttr("disabled");
 }
 $("#fpbtn").click(function(){
  loadtpage(1);
 });
 $("#rpbtn").click(function(){
  loadtpage(pagenum - 1);
 });
 $("#npbtn").click(function(){
  if ((pagenum + 1) >= pagecount) 
   loadtpage(pagecount);
  else
   loadtpage(pagenum + 1);
 });
 $("#lpbtn").click(function(){
  loadtpage(pagecount);
 });
 $("#gpbtn").click(function(){
  var tzys = $("#gpinput").val();
  var re = /^[1-9]+[0-9]*$/;
  if (tzys == null || tzys == undefined || tzys == '') {
   alert("请输入跳转页数!");
   $("#gpinput").focus();
   return;
  }
  if (!re.test(tzys)) {
   alert("请输入正确跳转页数!");
   $("#gpinput").focus();
   return;
  }
  if (tzys > pagecount) 
   tzys = pagecount;
  if (tzys <= 0) 
   tzys = 1;
  loadtpage(tzys);
 });
 $("#gpinput").val(pagenum);
}

<table>
 <tfoot>
  <tr>
   <td colspan="11">
    <span class="water-table-listbtn"></span>
    <span class="water-table-page">
     <span id="pagemsg" class="water-table-pagemsg">当前0/0页</span>
     <input type="button" id="fpbtn" value="首页"/>
     <input type="button" id="rpbtn" value="上页"/>
     <input type="button" id="npbtn" value="下页"/>
     <input type="button" id="lpbtn" value="尾页"/>
     <span id="pagemsg" class="water-table-pagemsg">跳转
     <input type="text" id="gpinput" size="3" value="0"/>页
     </span>
     <input type="button" id="gpbtn" value="跳转"/>
    </span>
   </td>
  </tr>
 </tfoot>
</table>