
        <link rel="help" href="http://www.w3.org/TR/CSS21/fonts.html#font-family-prop"/>
        <link rel="help" href="http://www.w3.org/TR/CSS21/syndata.html#parsing-errors"/>
        <meta name="flags" content="ahem invalid" />
        <meta name="assert" content="Invalid characters in font family names."/>
        <style type="text/css">* { margin: 0; padding: 0 }
            <![CDATA[
            #div3
            {
                background: red;
            }
            #div1
          