Per personalizzare gli stili CSS in base al browser IE esistono i seguenti commenti condizionali:

<!--[if IE]>
Is IE
<![endif]-->
<!--[if IE 6]>
Is IE 6
<![endif]-->
<!--[if IE 7]>
Is IE 7
<![endif]-->
<!--[if IE 8]>
Is IE 8
<![endif]-->
<!--[if IE 9]>
Is IE 9
<![endif]-->
<!--[if gte IE 8]>
Is IE 8 or higher
<![endif]-->
<!--[if lt IE 9]>
Is IE lower than 9
<![endif]-->
<!--[if lte IE 7]>
Is IE lower or equal to 7
<![endif]-->
<!--[if gt IE 6]>
Is IE greater than 6
<![endif]-->
<!--[if !IE]> -->
Is not IE
<!-- <![endif]-->

In questo modo possiamo applicare degli hack o delle personalizzazioni al browser IE desiderato!