How to get the browser information using javascript?

Refer
http://stackoverflow.com/questions/11219582/how-to-detect-my-browser-version-and-operating-system-using-javascript
http://web-design-lessons.com/articles/article/1/JavaScript%20Browser%20Detection
NOTE:
It is always best to avoid browser-specific code entirely where possible. The JQuery $.support property is available for detection of support for particular features rather than relying on browser name and version.

In Opera for example, you can fake an internet explorer or firefox instance.
A detailed description of JQuery.support can be found here: http://api.jquery.com/jQuery.support/

When coding websites, i always make sure, that basic functionality like navigation is also accessible to non-js users. This may be object to discussion and can be ignored if the homepage is targeted to a special audience.

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Chandu
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JAVASCRIPT CODE TO DETECT BROWSER VENDOR, VERSION, AND OPERATING SYSTEM

Refer "JAVASCRIPT CODE TO DETECT BROWSER VENDOR, VERSION, AND OPERATING SYSTEM " section in the link http://hea-www.harvard.edu/~fine/CFA/browser_type.html

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Chandu
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For Browser Type:

navigator.sayswho= (function(){
    var ua= navigator.userAgent, 
    N= navigator.appName, tem, 
    M= ua.match(/(opera|chrome|safari|firefox|msie|trident)\/?\s*([\d\.]+)/i) || [];
    M= M[2]? [M[1], M[2]]:[N, navigator.appVersion, '-?'];
    if(M && (tem= ua.match(/version\/([\.\d]+)/i))!= null) M[2]= tem[1];
    return M.join(' ');
})();

navigator.appVersion retunrs Browser Version

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Chandu
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Refer links
http://www.javascriptkit.com/javatutors/navigator.shtml
http://chiragrdarji.wordpress.com/2008/09/02/how-to-detect-browser-using-javascript/

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Chandu
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