One of our clients uses compatibility view for our site. Our website pages are old and cannot render in Standards mode. In IE10 compatibility view, if there is no doctype declaration, it forces it to IE5 Quirks mode. Is there a way from html to force it to IE Default Quirks mode?
Yes. Use an x-ua-compatible header to emulate IE10's behavior.
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE10">
You can add this to each page's <HEAD> section or serve it using the web server.
(More of the underlying behavior change can be found here.)
Hope this helps...
-- Lance