21/colors.html#background-properties" />
        <meta name="flags" content="image" />
        <meta name="assert" content="The 'background-position' property correctly applies a negative zero length value in percentages." />
        <style type="text/css">* { margin: 0; padding: 0 }
            div
            {
                background-repeat: no-repeat;
                height: 3in;
                width: 3in;
            }
            #div1
            {
                background-image: ur