[WordPress] Code for article: CSS Hacks for IE targeting only IE8, IE7 and IE6 - http://www.limecanvas.com/css-hacks-for-ie-targeting-only-ie8-ie7-and-ie6/

conditional-ie.html

<!--[if lte IE 9]>
  Your IE8 and below HTML code here.
  Perhaps importing a specific style sheet.
<![endif]-->

css-ie6.css

div {
  border: 2px solid #aaa; /* for all browsers */
  border: 2px solid #f009; /* IE8 and below - red border */
  *border: 2px solid #0f0; /* IE7 and below - green border */
  _border: 2px solid #00f; /* IE6 and below - blue border */
}

css-ie7.css

div {
  border: 2px solid #aaa; /* for all browsers */
  border: 2px solid #f009; /* IE8 and below - red border */
  *border: 2px solid #0f0; /* IE7 and below - green border */
}

css-ie8.css

div {
  border: 2px solid #aaa; /* for all browsers */
  border: 2px solid #f009; /* IE8 and below - red border */
}