ajax无刷新获取php后台数据

 $.ajax({
                 url:"result.php",
                 //data:{"page":i},
                 dataType:"json",
                 beforeSend:function(){
                 $("#load").append("<div id='loading'><img src='loading.gif'></div>");
                 },
                 success:function(json){
                 if(json){
                 $("#load").empty();
                     //alert(111);
                     var str = "";
                     $.each(json,function(index,array){
                     //alert(json);
                        //var str = "<div class=\"single_item\"><div class=\"element_head\">";
                         str += "<div class='author'>"+array['author']+"</div>";
                           str += "<div class=\"date\">"+array['date']+"</div>";
                           str += "<div class=\"title\ >"+array['title']+"</div>";
                           str += "<div class=\"more\"><a href='javascript:void(0)'>more>></a></div><br>";
                          str += "<div class='content'>"+array['content']+"</div><br><hr>";

                          $(".content").each(function(){
                                if($(this).text().length>100){
                              $(this).text($(this).text().substring(0,100));
                              $(this).html($(this).html()+'...');
                              }
                         })

                         $("#container").append(str);
                     });
                 }
                 }
                 });