.tl{background-image:url("../images/top_left_corner.png");background-repeat:no-repeat;height:27px;width:27px;}
.tc{background-image:url("../images/horizontal_shadow_top.png");background-repeat:repeat-x;}
.tr{background-image:url("../images/top_right_corner.png");background-repeat:no-repeat;height:27px;width:27px;}
.ml{background-image:url("../images/vertical_shadow_left.png");background-repeat:repeat-y;}
.mr{background-image:url("../images/vertical_shadow_right.png");background-position:right center;background-repeat:repeat-y;}
.bl{background-image:url("../images/bottom_left_corner.png");background-repeat:no-repeat;height:28px;width:27px;}
.bc{background-image:url("../images/horizontal_shadow_down.png");background-position:center bottom;background-repeat:repeat-x;}
.br{background-image:url("../images/bottom_right_corner.png");background-position:right center;background-repeat:no-repeat;height:28px;width:27px;}