javascript:如何判断客户端操作系统

如何判断浏览你的网页的用户用的操作系统，这一点javascript可以办到，下面是代码：


function detectOS()




...{


var sUserAgent = navigator.userAgent;


var isWin = (navigator.platform == "Win32") || (navigator.platform == "Windows");


var isMac = (navigator.platform == "Mac68K") || (navigator.platform == "MacPPC") || (navigator.platform == "Macintosh");


if(isMac) return "Mac";


var isUnix = (navigator.platform == "X11") && !isWin && !isMac;


if(isUnix) return "Unix";


if(isWin)




...{


var isWin95 = sUserAgent.indexOf("Win95") > -1 || sUserAgent.indexOf("Windows 95") > -1;


if(isWin95) return "Win95";


var isWin98 = sUserAgent.indexOf("Win98") > -1 || sUserAgent.indexOf("Windows 98") > -1;


if(isWin98) return "Win98";


var isWinME = sUserAgent.indexOf("Windows 9x 4.90") > -1 || sUserAgent.indexOf("Windows ME") > -1;


if(isWinME) return "WinME";


var isWin2K = sUserAgent.indexOf("Windows NT 5.0") > -1 || sUserAgent.indexOf("Windows 2000") > -1;


if(isWin2K) return "Win2000";


var isWinXP = sUserAgent.indexOf("Windows NT 5.1") > -1 || sUserAgent.indexOf("Windows XP") > -1;


if(isWinXP) return "WinXP";


}


return "None";


}