I found out that my javascript-intensive web site doesn\'t work reliably (or at all) in IE9.
It works, (usually, but not always) with the compatibility mode meta ta
The simplest way would be to use IE Conditionals.
Note: IE10 and beyond have removed support for this feature. For modern browsers the widely accepted way of conditionally displaying content for compatibility purposes is using feature detection. Modernizr is a popular library built for handling feature detection.
For example:
Examples from the conditional site:
You are not using Internet Explorer.
You are using a downlevel browser.