  return;
        }
        /*===========================================进度条===================================================*/
        //停止进度条
        function stopPressBar() {
            document.getElementById("preview").style.display = "none";
        }
        //开始进度条动画
        function startPressBar() {
            document.getElementById("preview").style.display = "block";
        }
       
      
    </script>
</head>
<body onload="init()">
    <div id="mapCon">
    