js实现ajax分页完整实例

!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
html xmlns="http://www.w3.org/1999/xhtml">
head>
meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
title>Untitled Document/title>
/head>
body>
style type="text/css">
*{margin:0;padding:0}
.ajax_page{padding:1px 4px;border:1px solid #e60011;margin:0 2px;text-decoration:none;color:#666666;font-family:mingliu;font-size:11px;height:14px;line-height:14px;float:left;font-weight:bold;display:block;}
span.currentPage{padding:2px 4px;color:#666666;font-size:11px;height:14px;line-height:14px;float:left;display:block;font-weight:bold;font-family:mingliu}
/style>
style type="text/css">
*{margin:0;padding:0}
.ajax_page{padding:1px 4px;border:1px solid #e60011;margin:0 2px;text-decoration:none;color:#666666;font-family:mingliu;font-size:11px;height:14px;line-height:14px;float:left;font-weight:bold;display:block;}
span.currentPage{padding:2px 4px;color:#666666;font-size:11px;height:14px;line-height:14px;float:left;display:block;font-weight:bold;font-family:mingliu}
/style>
div id="demo" style="width:500px;margin:10px auto;">/div>
script type="text/JavaScript">
!--
function initPage(totalPages,curPage,middlePage,Container){
  var htmlstr = '';
  if(curPage > totalPages) {curPage = totalPages}
  if(curPage  0) {curPage = 1}
  var curBigPage = Math.ceil(curPage/middlePage)
  //当前所在的屏数,如curPage=21,总页数为50页时,屏数就是3（当前是第几屏）实际上是这种形式：Math.ceil(curPage*pageSize/pageSize*perPage)
  var totalBigPage = Math.ceil(totalPages/middlePage); //总的屏数
  if( totalPages  middlePage){
    for(var i=1;itotalPages+1;i++){
      if(i == curPage){
        htmlstr += 'span class="currentPage">' + i + '/span>';
      }else{
        htmlstr += 'a href="javascript:void(0)" mce_href="javascript:void(0)" onclick="initPage('+ totalPages+','+i+','+middlePage +',/''+ container+'/');getPageData('+ i+');return false" class="ajax_page">'+i +'/a>';
      }
    }
  }else{
    var curBigStart = (curBigPage-1)*middlePage + 1;
    if(curBigPage == totalBigPage){
      var curBigEnd = totalPages;
    }else{
      var curBigEnd = curBigPage * middlePage;
    }
    if(curBigPage != 1){  //前一屏
      var preCurPage = curBigStart - middlePage;
      htmlstr += 'a href="javascript:void(0)" mce_href="javascript:void(0)" onclick="initPage('+ totalPages+','+preCurPage+','+middlePage +',/''+ container+'/');getPageData('+ preCurPage +');return false" class="ajax_page">pre/a>';
    }
    for(var i=curBigStart;i=curBigEnd;i++){
      if(i == curPage){
        htmlstr += 'span class="currentPage">' + i + '/span>';
      }else{
        htmlstr += 'a href="javascript:void(0)" mce_href="javascript:void(0)" onclick="initPage('+ totalPages+','+i+','+middlePage +',/''+ container+'/');getPageData('+ i +');return false" class="ajax_page">' + i + '/a>';
      }
    }
    if(curBigPage != totalBigPage){  //后一屏
      var nextCurPage = curBigStart + middlePage;
      htmlstr += 'a href="javascript:void(0)" mce_href="javascript:void(0)" onclick="initPage('+ totalPages+','+nextCurPage+','+middlePage +',/''+ container+'/');getPageData('+ nextCurPage + ');return false" class="ajax_page">next/a>';
    }
  }
  document.getElementById('demo').innerHTML = htmlstr
}
function getPageData(i){
  alert('现在取第 '+i+ ' 页数据');  //ajax get data
}
initPage(50,2,10,'demo');
// -->/script>
/body>
/html>