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				@@ -106,6 +106,23 @@ 
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				         window.open('https://appstore.ks3-cn-beijing.ksyuncs.com/googlechrome-mac.dmg'); 
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				       } 
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				     } 
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				+    const check360 = () => { 
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				+      console.log(navigator) 
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				+      const result = false; 
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				+      for (const key in navigator.plugins) { 
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				+        // np-mswmp.dll只在360浏览器下存在 
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				+        if (navigator.plugins[key].filename == 'internal-nacl-plugin') { 
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				+          console.log('来到插件') 
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				+          return !result; 
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				+        } 
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				+        if (navigator.plugins[key].filename == 'np-mswmp.dll') { 
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				+          console.log('来到插件') 
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				+          return !result; 
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				+        } 
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				+ 
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				+      } 
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				+      return result; 
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				+    }; 
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				     function getChromeVersion() { 
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				       var arr = navigator.userAgent.split(' '); 
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				       var chromeVersion = ''; 
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				@@ -127,21 +144,54 @@ 
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				       return false; 
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				     } 
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				-    function isChrome() { 
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				-      var isChromium = window.chrome; 
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				-      var winNav = window.navigator; 
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				-      var vendorName = winNav.vendor; 
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				-      var isOpera = typeof window.opr !== 'undefined'; 
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				-      var isIEedge = winNav.userAgent.indexOf('Edge') > -1; 
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				-      var isIOSChrome = winNav.userAgent.match('CriOS'); 
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				-      return ( 
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				-        isIOSChrome || 
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				-        (isChromium !== null && 
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				-          typeof isChromium !== 'undefined' && 
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				-          vendorName === 'Google Inc.' && 
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				-          isOpera === false && 
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				-          isIEedge === false) 
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				-      ); 
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				+    const isChrome = () => { 
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				+ 
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				+      const isChromium = window.chrome, 
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				+        winNav = window.navigator, 
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				+        vendorName = winNav.vendor, 
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				+        isOpera = winNav.userAgent.indexOf('OPR') > -1, 
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				+        isIEedge = winNav.userAgent.indexOf('Edge') > -1, 
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				+        isIOSChrome = winNav.userAgent.match('CriOS'), 
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				+        // QQ 
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				+        isQQBriwser = 
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				+          winNav.userAgent.indexOf('QQBrowser') > -1 || 
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				+          winNav.userAgent.indexOf('QQ') > -1, 
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				+        // 搜狗 
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				+        isSouggou = 
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				+          winNav.userAgent.indexOf('se 2.x') > -1 || 
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				+          winNav.userAgent.indexOf('MetaSr') > -1, 
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				+        // 360 
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				+        is360 = check360(), 
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				+        // 遨游 
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				+        isMaxthon = winNav.userAgent.indexOf('Maxthon') > -1, 
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				+        // 是否为2345浏览器 
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				+        is2345Explorer = winNav.userAgent.includes('2345Explorer'), 
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				+        // 世界之窗 
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				+        isTheWorld = winNav.userAgent.indexOf('TheWorld') > -1, 
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				+        // 猎豹 
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				+        isLiebao = winNav.userAgent.indexOf('LBBROWSER') > -1; 
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				+      console.log(winNav.userAgent) 
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				+      console.log(isQQBriwser, isSouggou, is360, isMaxthon, is2345Explorer, isTheWorld, isLiebao) 
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				+      if (isIOSChrome) { 
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				+        return true; 
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				+      } else if ( 
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				+        isChromium !== null && 
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				+        typeof isChromium !== 'undefined' && 
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				+        vendorName === 'Google Inc.' && 
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				+        isOpera === false && 
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				+        isIEedge === false && 
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				+        isQQBriwser === false && 
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				+        isSouggou === false && 
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				+        is360 === false && 
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				+        isMaxthon === false && 
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				+        is2345Explorer === false && 
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				+        isTheWorld === false && 
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				+        isLiebao === false 
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				+      ) { 
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				+        return true; 
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				+      } else { 
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				+        return false; 
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				+      } 
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				     }; 
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				     function IEVersion() { 
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				       var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串 
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				@@ -174,19 +224,16 @@ 
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				     (function (window) { 
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				       if (!isChrome()) { 
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				         // document.writeln("<div class='imgWrap'><img src='https://gyt.ks3-cn-beijing.ksyuncs.com/basic/1688699993534.png' class='bgImg' alt=''><img src='https://gyt.ks3-cn-beijing.ksyuncs.com/basic/1688699779209.png' class='btnImg' alt=''></div>"); 
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				- 
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				- 
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				         if (IEVersion() < 9 && IEVersion() != -1) { 
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				- 
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				           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>"); 
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				           document.execCommand("Stop"); 
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				         } else { 
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				           document.writeln(" <div class='imgWrap'><img onabort='this.src=this.src' src='https://gyt.ks3-cn-beijing.ksyuncs.com/basic/1688699993534.png' class='bgImg' alt=''><img src='https://gyt.ks3-cn-beijing.ksyuncs.com/basic/1688699779209.png'  onabort='this.src=this.src' onclick='gotoLinlk()' class='btnImg' alt=''></div>"); 
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				           document.execCommand("Stop"); 
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				+          window.stop() 
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				         } 
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				       } else { 
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				         if (getChromeVersion() < 90) { 
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				- 
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				           document.writeln(" <div class='imgWrap'><img src='https://gyt.ks3-cn-beijing.ksyuncs.com/basic/1688699993534.png' class='bgImg' alt=''><img src='https://gyt.ks3-cn-beijing.ksyuncs.com/basic/1688699779209.png' onclick='gotoLinlk()' class='btnImg' alt=''></div>"); 
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				           document.execCommand("Stop"); 
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				           window.stop() 
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