.upper_left {background-image:url(upper_left.gif);background-repeat:no-repeat;}
.upper_mid {background-image:url(upper_mid.gif);background-repeat:repeat-x;}
.upper_right {background-image:url(upper_right.gif);background-repeat:no-repeat;}
.mid_left {background-image:url(mid_left.gif);background-repeat:repeat-y;}
.mid_right {background-image:url(mid_right.gif);background-repeat:repeat-y;}
.lower_left {background-image:url(lower_left.gif);background-repeat:no-repeat;}
.lower_mid {background-image:url(lower_mid.gif);background-repeat:repeat-x;}
.lower_right {background-image:url(lower_right.gif);background-repeat:no-repeat;}