How to check . net framework install in client system using JavaScript for Chrome and Firefox

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Hi,

How to write JavaScript code to check .net framework is install in client system for chrome and Firefox. Code I have written is working fine only in IE.

JavaScript Code
-------------------------------------

JavaScript

var bAgn = navigator.userAgent;       
if (bAgn.indexOf(".NET4.0E") != -1)
  document.write(" Frame work installed.");

when I am trying to execute same code in chrome or Firefox, it's not working.

Posted 2-Jan-13 22:56pm

KK.Deep

Updated 2-Jan-13 23:56pm

DaveAuld

v2

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DaveAuld 3-Jan-13 5:58am

You should never rely on the useragent to determine the status of a clients configuration. The useragent can be tweaked/emptied/custom by the user. What are you trying to achieve by determining if the client has .Net or not?

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Accepted Answer · 2013-01-03T03:05:00

Refer How To Check .Net Framework Version Installed[^], which says that

Please take note that that JavaScript code can be used in Firefox or Opera web browser to query their User Agent String too (but only the IE will report .Net framework version in its User Agent String).

And you will get alternate ways to detect by code if you are doing in ASP.net.
Also follow Answer - How to detect .NET framework installed in a web page (pure HTML or PHP)[^].