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[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) {
	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 = 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 isMinMoz1 = sMinMoz1_4 = isMinMoz1_5 = false;
if (isMoz) {
	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;
}
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 >= 4.5;
	isMinNS4_7 = fAppVersion >= 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 = 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 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 (isMac) {
	isMac68K = sUserAgent.indexOf("Mac_68000") > -1
	|| sUserAgent.indexOf("68K") > -1;
	isMacPPC = sUserAgent.indexOf("Mac_PowerPC") > -1
	|| sUserAgent.indexOf("PPC") > -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;
	}
}