Basically I have this website that has been working very well in compatible mode IE7 for all versions of IE(I have used meta tag in IIS for this).
Now issue is with
Meta tag would change document mode for you whereas you still need to have fixed your application or server, this is a known issue.
This would fix browser mode and combining it with meta tag below would do the job for you.
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" >