Making the application browser specific

Question

The tested and supported platform for my application is Windows based computer with IE as browser. If the browser which the user uses is not Internet Explorer then my application should not permit the user to log in.

How do I do this. Thanks in advance

you can check for user-agent though it can be easily faked, but its a general approach. — Ankit, May 09 '13 at 10:56
You do know that internet explorer has only 30% market share. Perhaps do a bit more testing.... http://en.wikipedia.org/wiki/Usage_share_of_web_browsers — Richard Tingle, May 09 '13 at 10:56
Not so. But my client's requirements says so. I should deliver it exactly what they want — suresh, May 09 '13 at 11:00
You know if it works in IE its very likely to work in others, perhaps detect if IE and then produce a warning if not. That might be a little more of a proportional response. — Richard Tingle, May 09 '13 at 11:00
AY89 thanks for ur help. detected the browser with user agent. The next problem is to redirect it to an error page — suresh, May 09 '13 at 11:05
Duplicate of http://stackoverflow.com/questions/4411551/if-browser-is-internet-explorer-run-an-alternative-script-instead and http://stackoverflow.com/questions/6104109/detect-whether-browser-is-ie-7-or-lower — Richard Tingle, May 09 '13 at 11:07
@suresh, it's probably a good idea to inquire *why* your client wants that or believes they want it. Some clients are merely uninformed and, if they knew better, would not stipulate this requirement. — Michael Aaron Safyan, May 09 '13 at 11:09

KernelPanik · Accepted Answer · 2013-05-14T11:31:13.590

Well, if you really want to detect the usage of IE (although in most cases detecting browser supported features would be better), you can check if the User Agent is Internet Explorer, and if not, disable login.

In the below code snippet from Microsoft, getInternetExplorerVersion() returns -1 is the browser is not IE, and returns the version if the browser is IE. Based upon the value of this function, you can decide whether or not to enable login.

Example

var IEdetected = getInternetExplorerVersion();
if (IEdetected == -1){
     // disable login
}

IE Detection Code from MSDN

function getInternetExplorerVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
  var rv = -1; // Return value assumes failure.
  if (navigator.appName == 'Microsoft Internet Explorer')
  {
    var ua = navigator.userAgent;
    var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
    if (re.exec(ua) != null)
      rv = parseFloat( RegExp.$1 );
  }
  return rv;
}
function checkVersion()
{
  var msg = "You're not using Internet Explorer.";
  var ver = getInternetExplorerVersion();

  if ( ver > -1 )
  {
    if ( ver >= 8.0 ) 
      msg = "You're using a recent copy of Internet Explorer."
    else
      msg = "You should upgrade your copy of Internet Explorer.";
  }
  alert( msg );
}

Browser Detection Code from MSDN Article Detecting Windows Internet Explorer More Effectively

Making the application browser specific

1 Answers1