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); 
                    }); 
                }
                }
                });