lex
/
classroom-instruments


			
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							<!DOCTYPE html>

<html lang="zh-CN">


<head>
  <meta charset="UTF-8" />
  <link rel="icon" href="./favicon.ico" />
  <meta name="viewport"
    content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, viewport-fit=cover">
  <meta http-equiv="Cache-control" content="no-cache">
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  <title>音乐数字课堂</title>

  <style>
    body {
      background: #f1f5ff;
      width: 100%;
    }

    .bgImg {
      width: 23.75vw;
      height: 27.1875vw;
    }

    .btnImg {
      width: 15vw;
      position: absolute;
      left: 50%;
      margin-left: -7.5vw;
      bottom: 1.61458333vw;
      cursor: pointer;
      z-index: 100;

    }

    .imgWrap {
      width: 23.75vw;
      height: 27.1875vw;
      margin: 7.29166667vw auto 0;
      position: relative;
      z-index: 100;
    }

    /* margin-top: 300px; */
    .textWrap {
      margin-top: 7.29166667vw;
      text-align: center;
      width: 26.04166667vw;
      position: absolute;
      top: 7.34375vw;
      left: 50%;
      margin-left: -15vw;
    }

    .subMsg {
      margin-top: 1.66666667vw;
      font-size: 1.14583333rem;
      line-height: 1.5625vw;
      color: #777;
    }

    .subBtn {
      width: 12.03125vw;
      height: 3.22916667vw;
      background: #198CFE;
      border-radius: 0.9375vw;
      border: none;
      font-size: 1.14583333rem;
      font-weight: 600;
      color: #FFFFFF;
      line-height: 1.5625vw;
      cursor: pointer;
      margin-top: 1.66666667vw;
      list-style: none outside none;
      text-decoration: none;
    }
  </style>
  <script type="text/javascript">
    function gotoLinlk() {
      console.log('点击')
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      if (sAgent.indexOf("firefox") != -1) {
        return true;
      }
      return false;
    }

    function isChrome() {
      var isChromium = window.chrome;
      var winNav = window.navigator;
      var vendorName = winNav.vendor;
      var isOpera = typeof window.opr !== 'undefined';
      var isIEedge = winNav.userAgent.indexOf('Edge') > -1;
      var isIOSChrome = winNav.userAgent.match('CriOS');
      return (
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        (isChromium !== null &&
          typeof isChromium !== 'undefined' &&
          vendorName === 'Google Inc.' &&
          isOpera === false &&
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      );
    };
    function IEVersion() {
      var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
      var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1; //判断是否IE<11浏览器
      var isEdge = userAgent.indexOf("Edge") > -1 && !isIE; //判断是否IE的Edge浏览器
      var isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf("rv:11.0") > -1;
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        } else {
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        }
      } else if (isEdge) {
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      } else if (isIE11) {
        return 11; //IE11
      } else {
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      }
    }
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      //     if (flag) {
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      //     }
      //   });

      //   // 尝试监听install


      // }
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      //   console.log('controllerchange')
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      // })


      if (!isChrome()) {
        // document.writeln("<div class='imgWrap'><img src='https://oss.dayaedu.com/gyt/basic/1688699993534.png' class='bgImg' alt=''><img src='https://oss.dayaedu.com/gyt/basic/1688699779209.png' class='btnImg' alt=''></div>");


        if (IEVersion() < 9 && IEVersion() != -1) {

          document.writeln(" <div class='textWrap'><h1>当前浏览器版本过低</h1><p class='subMsg'>为了保证良好的上课体验，推荐您使用谷歌浏览器</p> <button class='subBtn' onclick='gotoLinlk()'>下载谷歌浏览器</button>");
          document.execCommand("Stop");
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          document.writeln(" <div class='imgWrap'><img onabort='this.src=this.src' src='https://oss.dayaedu.com/gyt/basic/1688699993534.png' class='bgImg' alt=''><img src='https://oss.dayaedu.com/gyt/basic/1688699779209.png'  onabort='this.src=this.src' onclick='gotoLinlk()' class='btnImg' alt=''></div>");
          document.execCommand("Stop");
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        if (getChromeVersion() < 90) {

          document.writeln(" <div class='imgWrap'><img src='https://oss.dayaedu.com/gyt/basic/1688699993534.png' class='bgImg' alt=''><img src='https://oss.dayaedu.com/gyt/basic/1688699779209.png' onclick='gotoLinlk()' class='btnImg' alt=''></div>");
          document.execCommand("Stop");
          window.stop()
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        // if (IsFF()) {

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    })(window);
  </script>
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