在浏览器中获取当前操作系统平台 windows , mac ,  Unix, linux,  other 代码

//获取当前浏览器操作系统平台
function getCurrentSystem() {var operatingInfo = navigator.userAgent;var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");var isMac = (navigator.platform == "Mac68K") || (navigator.platform == "MacPPC") || (navigator.platform == "Macintosh") || (navigator.platform == "MacIntel");if (isMac) return "Mac";var isUnix = (navigator.platform == "X11") && !isWin && !isMac;if (isUnix) return "Unix";var isLinux = (String(navigator.platform).indexOf("Linux") > -1);if (isLinux) return "Linux";if (isWin) {var isWin2K = operatingInfo.indexOf("Windows NT 5.0") > -1 || operatingInfo.indexOf("Windows 2000") > -1;if (isWin2K) return "Win2000";var isWinXP = operatingInfo.indexOf("Windows NT 5.1") > -1 || operatingInfo.indexOf("Windows XP") > -1;if (isWinXP) return "WinXP";var isWin2003 = operatingInfo.indexOf("Windows NT 5.2") > -1 || operatingInfo.indexOf("Windows 2003") > -1;if (isWin2003) return "Win2003";var isWinVista = operatingInfo.indexOf("Windows NT 6.0") > -1 || operatingInfo.indexOf("Windows Vista") > -1;if (isWinVista) return "WinVista";var isWin7 = operatingInfo.indexOf("Windows NT 6.1") > -1 || operatingInfo.indexOf("Windows 7") > -1;if (isWin7) return "Win7";var isWin10 = operatingInfo.indexOf("Windows NT 10") != -1;if (isWin10) return "Win10"}return "other";
}