经纬度是从页面输入的,但是构造的时候就只构造第一次输入的坐标的点,这是什么原因

            var pointArr = []; //坐标点对象数组
            function getPointObject(){
              var pointinfo = this.getPointInfo();
              var title = this.getTitle();
              var point = new markerArr(pointinfo,title);
              return point;
            }

            //坐标点对象构造函数
            function markerArr(point,title){
              this.point = point;
              this.title = title;
              return this;
            }

            //构造坐标点
            function getPointInfo(){
              var jin = $("#jin").val();
              var wei = $("#wei").val();
              var point = jin+','+wei;
              return point;
            }
            //标题
            function getTitle(){
              var title = $("#title").val();
              return title;
            }
            

显示坐标的的代码,这里会多次显示坐标,应该怎么修改??

         function setPoint(){
              var point = this.getPointObject();
              pointArr.push(point);
              console.log(pointArr);
              var points = new Array(); //存放标注点经纬信息的数组
              var marker = new Array(); //存放标注点对象的数组
              for (var i = 0; i < pointArr.length; i++) {
                  var p0 = pointArr[i].point.split(",")[0];
                  var p1 = pointArr[i].point.split(",")[1]; //按照原数组的point格式将地图点坐标的经纬度分别提出来
                  points[i] = new window.BMap.Point(p0, p1); //循环生成新的地图点
                  marker[i] = new window.BMap.Marker(points[i]);
                  //按照地图点坐标生成标记
                  window.map.addOverlay(marker[i]);
                  marker[i].setAnimation(BMAP_ANIMATION_BOUNCE);
                  var label = new window.BMap.Label(pointArr[i].title, { offset: new window.BMap.Size(20, -10) });
                  marker[i].setLabel(label);
              }
            }