1. function detectOS() {
  2.     var userAgent = navigator.userAgent;
  3.     var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");
  4.     var isMac = (navigator.platform == "Mac68K") || (navigator.platform == "MacPPC") || (navigator.platform == "Macintosh") || (navigator.platform == "MacIntel");
  5.     if (isMac) return "Mac";
  6.     var isUnix = (navigator.platform == "X11") && !isWin && !isMac;
  7.     if (isUnix) return "Unix";
  8.     var isLinux = (String(navigator.platform).indexOf("Linux") > -1);
  9.     if (isLinux) return "Linux";
  10.     if (isWin) {
  11.         var isWin2K = userAgent.indexOf("Windows NT 5.0") > -1 || userAgent.indexOf("Windows 2000") > -1;
  12.         if (isWin2K) return "Win2000";
  13.         var isWinXP = userAgent.indexOf("Windows NT 5.1") > -1 || userAgent.indexOf("Windows XP") > -1;
  14.         if (isWinXP) return "WinXP";
  15.         var isWin2003 = userAgent.indexOf("Windows NT 5.2") > -1 || userAgent.indexOf("Windows 2003") > -1;
  16.         if (isWin2003) return "Win2003";
  17.         var isWinVista= userAgent.indexOf("Windows NT 6.0") > -1 || userAgent.indexOf("Windows Vista") > -1;
  18.         if (isWinVista) return "WinVista";
  19.         var isWin7 = userAgent.indexOf("Windows NT 6.1") > -1 || userAgent.indexOf("Windows 7") > -1;
  20.         if (isWin7) return "Win7";
  21.         var isWin10 = operatingInfo.indexOf("Windows NT 10")!=-1;
  22.         if(isWin10) return "Win10"
  23.     }
  24.     return "other";
  25. }
  26. document.writeln("您的操作系统是：" + detectOS());