CodeHighlighter.addStyle("css", {
    comment: {
        exp: /\/\*[^*]*\*+([^\/][^*]*\*+)*\//
    },
    keyword: {
        exp: /@\w[\w\s]*/
    },
    selector: {
        exp: "([\\w-:\\[.#][^{};>]*)(?={)"
    },
    property: {
        exp: "([\\w-]+)(?=\\s*:)"
    },
    unit: {
        exp: /([0-9])(em|en|px|%|pt)\b/,
        replacement: "$1<span class=\"$0\">$2</span>"
    },
    url: {
        exp: /url\([^\)]*\)/
    }
});