    }
        }

        /** 开始进度条动画*/
        function startPressBar() {
            document.getElementById('preview').style.display = "";
        }

        /** 停止进度条动画*/
        function stopPressBar() {
            document.getElementById('preview').style.display = "none";
        }
    </script>
</head>
<body onload="init();">
<div id="preview" style="display: none; text-align: center; padding-top: 250px; font-weight: bold">
    <img src="./static/assets/graphic-image/39-1.