dedecms利用ajax实现瀑布流下拉无限加载的教程jquery

if(isset($_GET['AJAX'])){    $typeID = isset($_GET['typeID']) ? intval($_GET['typeID']): 0;//传递过来的分类ID    $page = isset($_GET['page']) ? intval($_GET['page']): 0;//页码    $pagesize = isset($_GET['pagesize']) ? intval($_GET['pagesize']): 15;//每页多少条，也就是一次加载多少条数据    $start = $page>0 ? ($page-1)*$pagesize : 0;//数据获取的起始位置。即limit条件的第一个参数。    $typesql = $typeID ? " WHERE typeID=$typeID" : '';//这个是用于首页实现瀑布流加载，因为首页加载数据是无需分类的，所以要加以判断，如果无需    $total_sql = "SELECT COUNT(ID) as num FROM `dede_archives` $typesql ";    $temp = $dsql->Getone($total_sql);    $total = 0;//数据总数    $load_num =0;    if(is_array($temp)){        $load_num= round(($temp['num']-15)/$pagesize);//要加载的次数,因为默认已经加载了        $total = $temp['num'];    }    $sql = "SELECT a.*,t.typedir,t.typename,t.isdefault,t.defaultname,t.namerule,t.namerule2,t.ispart,t.moresite,t.siteurl,t.sitepath    FROM `dede_archives` as a JOIN `dede_arctype` AS t ON a.typeID=t.ID $typesql ORDER BY ID DESC liMIT $start,$pagesize";    $dsql->Setquery($sql);    $dsql->Execute('List');    $statu = 0;//是否有数据，默认没有数据    $data = array();    $index = 0;    while($row = $dsql->GetArray("List")){        $row['info'] = $row['info'] = $row['infos'] = cn_substr($row['description'],160);        $row['ID'] =  $row['ID'];        $row['filename'] = $row['arcurl'] = GetfileUrl($row['ID'],$row['typeID'],$row['senddate'],$row['Title'],$row['ismake'],$row['arcrank'],$row['namerule'],$row['typedir'],$row['money'],$row['filename'],$row['moresite'],$row['siteurl'],$row['sitepath']);        $row['typeurl'] = GetTypeUrl($row['typeID'],$row['isdefault'],$row['defaultname'],$row['ispart'],$row['namerule2'],$row['sitepath']);        if($row['litpic'] == '-' || $row['litpic'] == ''){            $row['litpic'] = $GLOBALS['cfg_CMSpath'].'/images/defaultpic.gif';        }        if(!preg_match("#^http:\/\/#i",$row['litpic']) &&$GLOBALS['cfg_multi_site'] == 'Y'){            $row['litpic'] = $GLOBALS['cfg_mainsite'].$row['litpic'];        }        $row['picname'] = $row['litpic'];//缩略图        //$row['stime'] = GetDateMK($row['pubdate']);        $row['stime'] = date('Y-m-d H:i',$row['pubdate']);        $row['click'] = $row['click'];        $row['typelink'] = "".$row['typename']."";//分类链        $row['fullTitle'] = $row['Title'];//完整的标题        $row['shortTitle'] = $row['shortTitle'];//副标题        $row['Title'] = cn_substr($row['Title'],80);//截取后的标题        $data[$index] = $row;        $index++;    }    if(!empty($data)){        $statu = 1;//有数据    }    $result =array('statu'=>$statu,'List'=>$data,'total'=>$total,'load_num'=>$load_num);    echo Json_encode($result);//返回数据    exit();}