�除高亮显示结果图层drawLayerr
                drawSource.clear();
            }
            if(interActionSource)
            {
                interActionSource.clear();
            }
        }
        /*===========================================进度条===================================================*/
        //停止进度条
        function stopPressBar() {
            document.getElementById("preview").style.display = "none";
        }
        //开始进度条动画
        function st