Question

I have a web application that uses ajax with prototype.js (Ajax.Updater).

new Ajax.Updater('someID','/some/url',
    {
        asynchronous:true,
        evalScripts:true,
        parameters:Form.serialize(Event.element(event).form),
        requestHeaders:['X-Update', 'someID']
    }
);

Some (not all) IE9 users experience a strange phenomenon.

• UserAgent of normal (non-ajax) HTTP requests indicates that the browser is IE9, not in Compatibility View.
• UserAgent of ajax HTTP requests indicates that the browser is IE7 (IE9’s Compatibility View).

I want to force the browser not to use Compatibility View in ajax HTTP requests, but the html already has a meta tag : <meta http-equiv="X-UA-Compatible" content="IE=edge">.

Does anyone know the reason or workaround?

Answer 1

This is a possible solution – but not fully researched – try setting

Header set X-UA-Compatible "IE=edge"

in your httpd.conf or .htaccess file – this will add the X-UA-Compatible header to all responses from Apache to force IE not to use Compatibility Mode