title: Which css versions are supported in chm files?
body: <p>I am writing a stylesheet to use with my Compiled Help files. It looks like CSS2 generally works, but I'm not sure about CSS selectors like <code>&gt;</code> and <code>+</code>.</p>
  
  <p>Is the CHM format equivalent to, say, IE 7?
  fwiw, I am authoring on Windows 7 and IE9 is installed.</p>