/*
	This lib check the client's web browser and operating system. Main object is : SysInf 
*/

//alert( "systemDetect.js init:ed" );

var sUserAgent = navigator.userAgent;
var fAppVersion = parseFloat(navigator.appVersion);

//this object holds the browser and os type and version
var SysInf = new Object();

//returns a string with them compiled
SysInf.write = function()
{
	return "Browser: "+this.sBrowser+this.sBrowserVersion+"\nOperating System: "+this.sOS+this.sOSVersion;
}


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[i] < aVersion2[i])
		{
			return -1;
		}
		else if (aVersion1[i] > aVersion2[i]) 
		{
			return 1;
		}
	}
	return 0;
}

var isOpera = sUserAgent.indexOf("Opera") > -1;
var isMinOpera4 = isMinOpera5 = isMinOpera6 = isMinOpera7 = isMinOpera7_5 = false;

if (isOpera)
{
	SysInf.sBrowser = "Opera";
	
	var fOperaVersion;
	if(navigator.appName == "Opera")
	{
		fOperaVersion = fAppVersion;
	}
	else
	{
		var reOperaVersion = new RegExp("Opera (\\d+\\.\\d+)");
		reOperaVersion.test(sUserAgent);
		fOperaVersion = parseFloat(RegExp["$1"]);
	}
	SysInf.sBrowserVersion = fOperaVersion;
	
	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)
	{
		SysInf.sBrowser = "Safari";
		
		var reAppleWebKit = new RegExp("AppleWebKit\\/(\\d+(?:\\.\\d*)?)");
		reAppleWebKit.test(sUserAgent);
		var fAppleWebKitVersion = parseFloat(RegExp["$1"]);
		
		SysInf.sBrowserVersion = fAppleWebKitVersion;
		
		isMinSafari1 = fAppleWebKitVersion >= 85;
		isMinSafari1_2 = fAppleWebKitVersion >= 124;
	}
	else if (isKonq)
	{
		SysInf.sBrowser = "Konquer";
		
		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;
		
		if( isMinKonq2_2 ) SysInf.sBrowserVersion = " 2.2";
		if( isMinKonq3 ) SysInf.sBrowserVersion = " 3";
		if( isMinKonq3_1 ) SysInf.sBrowserVersion = " 3.1";
		if( isMinKonq3_2 ) SysInf.sBrowserVersion = " 3.2";
	}
}

var isIE = sUserAgent.indexOf("compatible") > -1 && sUserAgent.indexOf("MSIE") > -1 && !isOpera;
var isMinIE4 = isMinIE5 = isMinIE5_5 = isMinIE6 = false;

if (isIE)
{
	SysInf.sBrowser = "Internet Explorer";
	
	var reIE = new RegExp("MSIE (\\d+\\.\\d+);");
	reIE.test(sUserAgent);
	var fIEVersion = parseFloat(RegExp["$1"]);
	
	SysInf.sBrowserVersion = fIEVersion;
	
	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 isMinMoz1 = sMinMoz1_4 = isMinMoz1_5 = false;

if (isMoz)
{
	SysInf.sBrowser = "Mozilla";
	
	var reMoz = new RegExp("rv:(\\d+\\.\\d+(?:\\.\\d+)?)");
	reMoz.test(sUserAgent);
	isMinMoz1 = compareVersions(RegExp["$1"], "1.0") >= 0;
	isMinMoz1_4 = compareVersions(RegExp["$1"], "1.4") >= 0;
	isMinMoz1_5 = compareVersions(RegExp["$1"], "1.5") >= 0;
	
	if( isMinMoz1 ) SysInf.sBrowserVersion = " 1.0";
	if( isMinMoz1_4 ) SysInf.sBrowserVersion = " 1.4";
	if( isMinMoz1_5 ) SysInf.sBrowserVersion = " 1.5";
}

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) 
{
	SysInf.sBrowser = "NS4";
	
	isMinNS4 = true;
	isMinNS4_5 = fAppVersion >= 4.5;
	isMinNS4_7 = fAppVersion >= 4.7;
	isMinNS4_8 = fAppVersion >= 4.8;
	
	if( isMinNS4_5 ) SysInf.sBrowserVersion = ".5";
	if( isMinNS4_7 ) SysInf.sBrowserVersion = ".7";
	if( isMinNS4_8 ) SysInf.sBrowserVersion = ".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 = false;
var isMac68K = isMacPPC = false;
var isSunOS = isMinSunOS4 = isMinSunOS5 = isMinSunOS5_5 = false;

if (isWin)
{
	SysInf.sOS = "Windows";
	
	isWin95 = sUserAgent.indexOf("Win95") > -1 || sUserAgent.indexOf("Windows 95") > -1;
	isWin98 = sUserAgent.indexOf("Win98") > -1 || sUserAgent.indexOf("Windows 98") > -1;
	isWinME = sUserAgent.indexOf("Win 9x 4.90") > -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);
	
	if( isWin95 ) SysInf.sOSVersion = " 95";
	if( isWin98 ) SysInf.sOSVersion = " 98";
	if( isWinME ) SysInf.sOSVersion = " ME";
	if( isWin2K ) SysInf.sOSVersion = " 2000";
	if( isWinXP ) SysInf.sOSVersion = " XP";
	if( isWinNT4 ) SysInf.sOSVersion = " NT4";
}
if (isMac)
{
	SysInf.sOS = "Mac";
	
	isMac68K = sUserAgent.indexOf("Mac_68000") > -1 || sUserAgent.indexOf("68K") > -1;
	isMacPPC = sUserAgent.indexOf("Mac_PowerPC") > -1 || sUserAgent.indexOf("PPC") > -1;
	
	if( isMac68K ) SysInf.sOSVersion = " 68K";
	if( isMacPPC ) SysInf.sOSVersion = " PowerPC";
}
if (isUnix)
{
	SysInf.sOS = "Unix";
	
	isSunOS = sUserAgent.indexOf("SunOS") > -1;
	if (isSunOS)
	{
		SysInf.sOS = "SunOS";
		
		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;
		
		if( isMinSunOS4 ) SysInf.sOSVersion = " 4";
		if( isMinSunOS5 ) SysInf.sOSVersion = " 5";
		if( isMinSunOS5_5 ) SysInf.sOSVersion = " 5.5";
	}
}