$.ajax({
                                type: "POST",
                                url: "<{spUrl c='sentences' a='modifyAjax'}>",
                                data: postdata,
                                success: function(msg){       
                                        //alert(msg);
                                        if(msg == 'true'){
                                                window.alert("修改成功！");
                      window.self.close();
                      window.opener.location="javascript:reloadPage();";
                                        }
                                },
                                complete: function(xhr,status){ 
                                }
                        });