Adds support for :before and :after (in the form of .before and .after classes) to IE7. Use with Modernizr.

ie7-pseudo.css

.lt-ie8 .class-selector {
    *zoom: expression(
        this.runtimeStyle.zoom="1",
        this.insertBefore(
            document.createElement("div"),
            this.childNodes[0]
        ).className="before",
        this.appendChild(
            document.createElement("div")
        ).className="after"
    );
}

.tabs:before, 
.tabs .before {
  /* Styles */
}
.tabs:after, 
.tabs .after {
  /* Styles */
}