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

this.isBrowserInfo = "YES";

this.isGecko       = (ua.indexOf('gecko') != -1 && ua.indexOf('safari') == -1);
this.isAppleWebKit = (ua.indexOf('applewebkit') != -1);

this.isKonqueror   = (ua.indexOf('konqueror') != -1); 
this.isSafari      = (ua.indexOf('safari') != - 1);
this.isOmniweb     = (ua.indexOf('omniweb') != - 1);
this.isOpera       = (ua.indexOf('opera') != -1); 
this.isIcab        = (ua.indexOf('icab') != -1); 
this.isAol         = (ua.indexOf('aol') != -1); 
this.isIE          = (ua.indexOf('msie') != -1 && !this.isOpera && (ua.indexOf('webtv') == -1) ); 
this.isMozilla     = (this.isGecko && ua.indexOf('gecko/') + 14 == ua.length);
this.isFirebird    = (ua.indexOf('firebird/') != -1);
this.isNS          = ( (this.isGecko) ? (ua.indexOf('netscape') != -1) : ( (ua.indexOf('mozilla') != -1) && !this.isOpera && !this.isSafari && (ua.indexOf('spoofer') == -1) && (ua.indexOf('compatible') == -1) && (ua.indexOf('webtv') == -1) && (ua.indexOf('hotjava') == -1) ) );

this.isIECompatible = ( (ua.indexOf('msie') != -1) && !this.isIE);
this.isNSCompatible = ( (ua.indexOf('mozilla') != -1) && !this.isNS && !this.isMozilla);

this.geckoVersion = ( (this.isGecko) ? ua.substring( (ua.lastIndexOf('gecko/') + 6), (ua.lastIndexOf('gecko/') + 14) ) : -1 );
this.equivalentMozilla = ( (this.isGecko) ? parseFloat( ua.substring( ua.indexOf('rv:') + 3 ) ) : -1 );
this.appleWebKitVersion = ( (this.isAppleWebKit) ? parseFloat( ua.substring( ua.indexOf('applewebkit/') + 12) ) : -1 );

this.versionMinor = parseFloat(navigator.appVersion); 

if (this.isGecko && !this.isMozilla) {
this.versionMinor = parseFloat( ua.substring( ua.indexOf('/', ua.indexOf('gecko/') + 6) + 1 ) );
} else if (this.isMozilla) {
this.versionMinor = parseFloat( ua.substring( ua.indexOf('rv:') + 3 ) );
} else if (this.isIE && this.versionMinor >= 4) {
this.versionMinor = parseFloat( ua.substring( ua.indexOf('msie ') + 5 ) );
} else if (this.isKonqueror) {
this.versionMinor = parseFloat( ua.substring( ua.indexOf('konqueror/') + 10 ) );
} else if (this.isSafari) {
this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('safari/') + 7 ) );
} else if (this.isOmniweb) {
this.versionMinor = parseFloat( ua.substring( ua.lastIndexOf('omniweb/') + 8 ) );
} else if (this.isOpera) {
this.versionMinor = parseFloat( ua.substring( ua.indexOf('opera') + 6 ) );
} else if (this.isIcab) {
this.versionMinor = parseFloat( ua.substring( ua.indexOf('icab') + 5 ) );
}

this.versionMajor = parseInt(this.versionMinor); 

this.isDOM1 = (document.getElementById);
this.isDOM2Event = (document.addEventListener && document.removeEventListener);

this.mode = document.compatMode ? document.compatMode : 'BackCompat';

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 || ua.indexOf('xp') != -1) );
this.isMac    = (ua.indexOf('mac') != -1);
this.isUnix   = (ua.indexOf('unix') != -1 || ua.indexOf('sunos') != -1 || ua.indexOf('bsd') != -1 || ua.indexOf('x11') != -1)
this.isLinux  = (ua.indexOf('linux') != -1);

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.isNS7x = (this.isNS && this.versionMajor == 7);
this.isNS7up = (this.isNS && this.versionMajor >= 7);

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.isIE55up = (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);
}
document.browserInfo = new BrowserDetect();