checking for browser

**mjunior** · May 2, 2007, 10:49

Hi,
I´m doing check for browser allowing only IE to pass through, redirecting the others to a error page. But when a Firefox with No-Scripts extension opens the page, the js browser check doesn´t load, so it opens normaly.
How can I check for js support, to add to my if clause, so the firefox with No-Scrip also is redirected to error page?

**MikeFoster** · May 2, 2007, 11:38

Hi mjunior,

Without seeing your code I can't really suggest much, but if it were me I'd probably use JScript conditional compilation.

**MikeFoster** · May 2, 2007, 12:11

Code:

/*@cc_on
@if (@_jscript) // any version of IE
  // ...code for IE...
@else @*/
  // ...code for non-IE...
/*@end @*/

**Kravvitz** · May 2, 2007, 12:37

So why are you only supporting IE?

**mjunior** · May 2, 2007, 17:18

Originally Posted by Kravvitz

So why are you only supporting IE?

yeah I know that you advise just the oposite, but by now all the layouts and designed pages made by others to our intranet were made and tested only in IE, so it'' ll be a hell of a work to compliance them all at the moment.

The checking I'm doing now is:
function detectBrowser(){var browser=navigator.appName
var b_version=navigator.appVersion
var version=parseFloat(b_version)
if ((browser!="Microsoft Internet Explorer")
&& (version>4)) {window.location='browser.asp?msg=browser'}
}

**Kravvitz** · May 2, 2007, 19:09

So why don't you want to allow people to see the broken pages if they want to see them?

**SimplyFu** · May 2, 2007, 21:03

So why don't you want to allow people to see the broken pages if they want to see them?

haha

it is just a matter of preference. No big deals to hide ugly things and prevent it to be shown.

**mjunior** · May 3, 2007, 08:33

So, what should I add to my " if " statement to prevent from no js enable on the browsers?

**felgall** · May 3, 2007, 10:54

Why not just surround all the body of your page inside an IE conditional so that the page looks blank to anyone using a proper web browser.

<body></body>

**Kravvitz** · May 3, 2007, 10:57

The problem with that would be if you had any HTML comments in the content of the page.

**the DtTvB** · May 3, 2007, 19:44

If you wanted to kick non-IE users out, you can use:

Code:

<![if !IE]><meta http-equiv="refresh" content="0;url=http://www.google.com/" /><![endif]>

Note that it will make your page invalid. W3C validator won't accept this.

**siteguru** · May 4, 2007, 03:05

Originally Posted by mjunior

So, what should I add to my " if " statement to prevent from no js enable on the browsers?

Nothing - because if the browser doesn't have JavaScript enabled then your function will never run.

**Ize** · May 4, 2007, 06:04

Originally Posted by the DtTvB

If you wanted to kick non-IE users out, you can use:

Code:

<![if !IE]><meta http-equiv="refresh" content="0;url=http://www.google.com/" /><![endif]>

Note that it will make your page invalid. W3C validator won't accept this.

Considering the site only works in IE and it's too much work to make it behave in other browsers, I doubt it'll validate in the first place

Originally Posted by siteguru

Nothing - because if the browser doesn't have JavaScript enabled then your function will never run.

Good point. There's no way you can use a Javascript function to redirect a user when Javascript is disabled

Anyway, I'd do as Kravvitz suggested; just show the broken page. Why go out of your way to prevent this?

Also, I like this approach by Dean Edwards.

**funkdaddy** · May 4, 2007, 12:14

Just let people see it and let it render poorly - better they get ugly content than no content.

**SimplyFu** · May 4, 2007, 17:08

well, it is better to notify them switching to another browser

**felgall** · May 5, 2007, 16:57

Some people don't get a choice of browser when their particular disability means that the one they are using is the only one that they can make work properly for them. Anyway, people should be able to choose the browser that they want to use and if enough of them use a crappy non-standard browser you have to patch your page so that it works there as well as in decent modern standard compliant browsers. (on second thoughts let's all not patch our sites to work with the non-standard browsers and maybe that will force people to abandon IE7).

**mjunior** · May 7, 2007, 08:55

So there´s no way, right?

**standleydj** · May 7, 2007, 18:07

No i think of a single way to do this and nor should there be

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