:after and :before for IE6+ with a SASS mixin

gistfile1.scss

@mixin pseudo-element($type : "before", $content : "", $css_property : "zoom") {
  & {
    *#{$css_property}: expression(
      this.runtimeStyle.zoom="1",
      (is_before_element = ("#{$type}" == 'before')),
      (e = this[ is_before_element ? 'insertBefore' : 'appendChild']( document.createElement("small"), is_before_element ? this.firstChild : null )),
      e.innerHTML="#{$content}",
      e.className="#{$type} pseudo-element"
    );
  }
  
  &:before {
    content : $content;
  }
}