.tl_exp { background: url("../images/round_colors/exp_01.gif") no-repeat left top; }
.tr_exp { background: url("../images/round_colors/exp_02.gif") no-repeat right top; }
.bl_exp { background: url("../images/round_colors/exp_03.gif") no-repeat left bottom; }
.br_exp { background: url("../images/round_colors/exp_04.gif") no-repeat right bottom; }

.sub_exp, .full_exp { background-color: #4b7aa9; }