Javascript-based browser and System Function Testing

Detect JS Code of various browsers and Systems The Code is as follows:

Var sUserAgent = navigator. userAgent;
Var fAppVersion = parseFloat (navigator. appVersion );
Function compareVersions (sVersion1, sVersion2 ){
Var aVersion1 = sVersion1.split (".");
Var aVersion2 = sVersion2.split (".");
If (aVersion1.length> aVersion2.length ){
For (var I = 0; I <aVersion1.length-aVersion2.length; I ++ ){
AVersion2.push ("0 ");
}
} Else if (aVersion1.length <aVersion2.length ){
For (var I = 0; I <aVersion2.length-aVersion1.length; I ++ ){
AVersion1.push ("0 ");
}
}
For (var I = 0; I <aVersion1.length; I ++ ){
If (aVersion1 <aVersion2 ){
Return-1;
} Else if (aVersion1> aVersion2 ){
Return 1;
}
}
Return 0;
}
Var isOpera = sUserAgent. indexOf ("Opera")>-1;
Var isMinOpera4 = isMinOpera5 = isMinOpera6 = isMinOpera7 = isMinOpera7_5 = false;
If (isOpera ){
Var fOperaVersion;
If (navigator. appName = "Opera "){
FOperaVersion = fAppVersion;
} Else {
Var reOperaVersion = new RegExp ("Opera (\ d + \. \ d + )");
ReOperaVersion. test (sUserAgent );
FOperaVersion = parseFloat (RegExp ["$1"]);
}
IsMinOpera4 = fOperaVersion> = 4;
IsMinOpera5 = fOperaVersion> = 5;
IsMinOpera6 = fOperaVersion> = 6;
IsMinOpera7 = fOperaVersion> = 7;
IsMinOpera7_5 = fOperaVersion> = 7.5;
}
Var isKHTML = sUserAgent. indexOf ("KHTML")>-1
| SUserAgent. indexOf ("Konqueror")>-1
| SUserAgent. indexOf ("AppleWebKit")>-1;
Var isMinSafari1 = isMinSafari1_2 = false;
Var isMinKonq2_2 = isMinKonq3 = isMinKonq3_1 = isMinKonq3_2 = false;
If (isKHTML ){
IsSafari = sUserAgent. indexOf ("AppleWebKit")>-1;
IsKonq = sUserAgent. indexOf ("Konqueror")>-1;
If (isSafari ){
Var reAppleWebKit = new RegExp ("AppleWebKit \\/ (\ d + (? : \. \ D *)?) ");
ReAppleWebKit. test (sUserAgent );
Var fAppleWebKitVersion = parseFloat (RegExp ["$1"]);
IsMinSafari1 = fAppleWebKitVersion> = 85;
IsMinSafari1_2 = fAppleWebKitVersion> = 124;
} Else if (isKonq ){
Var reKonq = new RegExp ("Konqueror \/(\ d + (? : \. \ D + (? : \. \ D )?)?) ");
ReKonq. test (sUserAgent );
IsMinKonq2_2 = compareVersions (RegExp ["$1"], "2.2")> = 0;
IsMinKonq3 = compareVersions (RegExp ["$1"], "3.0")> = 0;
IsMinKonq3_1 = compareVersions (RegExp ["$1"], "3.1")> = 0;
IsMinKonq3_2 = compareVersions (RegExp ["$1"], "3.2")> = 0;
}
}
Var isIE = sUserAgent. indexOf ("compatible")>-1
& SUserAgent. indexOf ("MSIE")>-1
&! IsOpera;
Var isMinIE4 = isMinIE5 = isMinIE5_5 = isMinIE6 = isMinIE7 = false;
If (isIE ){
Var reIE = new RegExp ("MSIE (\ d + \. \ d + );");
ReIE. test (sUserAgent );
Var fIEVersion = parseFloat (RegExp ["$1"]);
IsMinIE4 = fIEVersion> = 4;
IsMinIE5 = fIEVersion> = 5;
IsMinIE5_5 = fIEVersion> = 5.5;
IsMinIE6 = fIEVersion> = 6.0;
IsMinIE7 = fIEVersion> = 7.0;
}
Var isMoz = sUserAgent. indexOf ("Gecko")>-1
&! IsKHTML;
Var ismin1_1 = smin1_1_4 = ismin1_1_5 = isMinMozl_5_1 = false;
If (isMoz ){
Var reMoz = new RegExp ("rv \ d + \. \ d + (? : \. \ D + )?) ");
ReMoz. test (sUserAgent );
Ismin1_1 = compareVersions (RegExp ["$1"], "1.0")> = 0;
Ismin1_1_4 = compareVersions (RegExp ["$1"], "1.4")> = 0;
Ismin1_1_5 = compareVersions (RegExp ["$1"], "1.5")> = 0;
Ismin1_2 = compareVersions (RegExp ["$1"], "1.8")> = 0;
}
Var isNS4 =! IsIE &! IsOpera &&! IsMoz &&! IsKHTML
& (SUserAgent. indexOf ("Mozilla") = 0)
& (Navigator. appName = "Netscape ")
& (FAppVersion> = 4.0 & fAppVersion <5.0 );
Var isMinNS4 = isMinNS4_5 = isMinNS4_7 = isMinNS4_8 = false;
If (isNS4 ){
IsMinNS4 = true;
IsMinNS4_5 = fAppVersion & gt; = 4.5;
IsMinNS4_7 = fAppVersion & gt; = 4.7;
IsMinNS4_8 = fAppVersion> = 4.8;
}
Var isWin = (navigator. platform = "Win32") | (navigator. platform = "Windows ");
Var isMac = (navigator. platform = "Mac68K") | (navigator. platform = "MacPPC ")
| (Navigator. platform = "Macintosh ");
Var isUnix = (navigator. platform = "X11 ")&! IsWin &&! IsMac;
Var isWin95 = isWin98 = isWinNT4 = isWin2K = isWinME = isWinXP = isWin03 = false;
Var isMac68K = isMacPPC = false;
Var isSunOS = isMinSunOS4 = isMinSunOS5 = isMinSunOS5_5 = false;
If (isWin ){
IsWin95 = sUserAgent. indexOf ("Win95")>-1
| SUserAgent. indexOf ("Windows 95")>-1;
IsWin98 = sUserAgent. indexOf ("Win98")>-1
| SUserAgent. indexOf ("Windows 98")>-1;
IsWinME = sUserAgent. indexOf ("Win 9x4.90")>-1
| SUserAgent. indexOf ("Windows ME")>-1;
IsWin2K = sUserAgent. indexOf ("Windows NT 5.0")>-1
| SUserAgent. indexOf ("Windows 2000")>-1;
IsWinXP = sUserAgent. indexOf ("Windows NT 5.1")>-1
| SUserAgent. indexOf ("Windows XP")>-1;
IsWinNT4 = sUserAgent. indexOf ("WinNT")>-1
| SUserAgent. indexOf ("Windows NT")>-1
| SUserAgent. indexOf ("WinNT4.0")>-1
| SUserAgent. indexOf ("Windows NT 4.0")>-1
&(! IsWinME &&! IsWin2K &&! IsWinXP );
IsWin03 = sUserAgent. intexOf ("Windows NT 5.2")>-1
}
If (isMac ){
IsMac68K = sUserAgent. indexOf ("Mac_68000")>-1
| SUserAgent. indexOf ("68 K")>-1;
IsMacPPC = sUserAgent. indexOf ("Mac_PowerPC")>-1
| SUserAgent. indexOf ("PC")>-1;
}
If (isUnix ){
IsSunOS = sUserAgent. indexOf ("SunOS")>-1;
If (isSunOS ){
Var reSunOS = new RegExp ("SunOS (\ d + \. \ d + (? : \. \ D + )?) ");
ReSunOS. test (sUserAgent );
IsMinSunOS4 = compareVersions (RegExp ["$1"], "4.0")> = 0;
IsMinSunOS5 = compareVersions (RegExp ["$1"], "5.0")> = 0;
IsMinSunOS5_5 = compareVersions (RegExp ["$1"], "5.5")> = 0;
}
}