JavaScript Browser Detect Lite v2.1

Posted 2021-05-20

// Browser Detect Lite  v2.1
// http://www.dithered.com/javascript/browser_detect/index.html
// modified by Chris Nott ([e-mail] - remove NOSPAM)
//
// modified by Michael Lovitt to include OmniWeb and Dreamcast

function BrowserDetectLite() {
	var ua = navigator.userAgent.toLowerCase(); 
	this.ua = ua;

	// browser name
	this.isGecko     = (ua.indexOf('gecko') != -1);
	this.isMozilla   = (this.isGecko && ua.indexOf("gecko/") + 14 == ua.length);
	this.isNS        = ( (this.isGecko) ? (ua.indexOf('netscape') != -1) : ( (ua.indexOf('mozilla') != -1) && (ua.indexOf('spoofer') == -1) && (ua.indexOf('compatible') == -1) && (ua.indexOf('opera') == -1) && (ua.indexOf('webtv') == -1) && (ua.indexOf('hotjava') == -1) ) );
	this.isIE        = ( (ua.indexOf("msie") != -1) && (ua.indexOf("opera") == -1) && (ua.indexOf("webtv") == -1) ); 
	this.isOpera     = (ua.indexOf("opera") != -1); 
	this.isKonqueror = (ua.indexOf("konqueror") != -1); 
	this.isIcab      = (ua.indexOf("icab") != -1); 

	this.isAol       = (ua.indexOf("aol") != -1); 
	this.isWebtv     = (ua.indexOf("webtv") != -1); 
	this.isOmniweb   = (ua.indexOf("omniweb") != -1);
	this.isDreamcast   = (ua.indexOf("dreamcast") != -1);
	
	// spoofing and compatible browsers
	this.isIECompatible = ( (ua.indexOf("msie") != -1) && !this.isIE);
	this.isNSCompatible = ( (ua.indexOf("mozilla") != -1) && !this.isNS && !this.isMozilla);
	
	// browser version
	this.versionMinor = parseFloat(navigator.appVersion); 
	
	// correct version number for NS6+ 
	if (this.isNS && this.isGecko) {
		this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('/') + 1 ) );
	}
	
	// correct version number for IE4+ 
	else if (this.isIE && this.versionMinor >= 4) {
		this.versionMinor = parseFloat( ua.substring( ua.indexOf('msie ') + 5 ) );
	}
	
	// correct version number for Opera 
	else if (this.isOpera) {
		if (ua.indexOf('opera/') != -1) {
			this.versionMinor = parseFloat( ua.substring( ua.indexOf('opera/') + 6 ) );
		}
		else {
			this.versionMinor = parseFloat( ua.substring( ua.indexOf('opera ') + 6 ) );
		}
	}
	
	// correct version number for Konqueror
	else if (this.isKonqueror) {
		this.versionMinor = parseFloat( ua.substring( ua.indexOf('konqueror/') + 10 ) );
	}
	
	// correct version number for iCab 
	else if (this.isIcab) {
		if (ua.indexOf('icab/') != -1) {
			this.versionMinor = parseFloat( ua.substring( ua.indexOf('icab/') + 6 ) );
		}
		else {
			this.versionMinor = parseFloat( ua.substring( ua.indexOf('icab ') + 6 ) );
		}
	}
	
	// correct version number for WebTV
	else if (this.isWebtv) {
		this.versionMinor = parseFloat( ua.substring( ua.indexOf('webtv/') + 6 ) );
	}
	
	this.versionMajor = parseInt(this.versionMinor); 
	this.geckoVersion = ( (this.isGecko) ? ua.substring( (ua.lastIndexOf('gecko/') + 6), (ua.lastIndexOf('gecko/') + 14) ) : -1 );
	
	// platform
	this.isWin   = (ua.indexOf('win') != -1);
	this.isWin32 = (this.isWin && ( ua.indexOf('95') != -1 || ua.indexOf('98') != -1 || ua.indexOf('nt') != -1 || ua.indexOf('win32') != -1 || ua.indexOf('32bit') != -1) );
	this.isMac   = (ua.indexOf('mac') != -1);
	this.isUnix  = (ua.indexOf('unix') != -1 || ua.indexOf('linux') != -1 || ua.indexOf('sunos') != -1 || ua.indexOf('bsd') != -1 || ua.indexOf('x11') != -1)
	
	// specific browser shortcuts
	this.isNS4x = (this.isNS && this.versionMajor == 4);
	this.isNS40x = (this.isNS4x && this.versionMinor < 4.5);
	this.isNS47x = (this.isNS4x && this.versionMinor >= 4.7);
	this.isNS4up = (this.isNS && this.versionMinor >= 4);
	this.isNS6x = (this.isNS && this.versionMajor == 6);
	this.isNS6up = (this.isNS && this.versionMajor >= 6);
	
	this.isIE4x = (this.isIE && this.versionMajor == 4);
	this.isIE4up = (this.isIE && this.versionMajor >= 4);
	this.isIE5x = (this.isIE && this.versionMajor == 5);
	this.isIE55 = (this.isIE && this.versionMinor == 5.5);
	this.isIE5up = (this.isIE && this.versionMajor >= 5);
	this.isIE6x = (this.isIE && this.versionMajor == 6);
	this.isIE6up = (this.isIE && this.versionMajor >= 6);
	
	this.isIE4xMac = (this.isIE4x && this.isMac);
}
var browser = new BrowserDetectLite();