.pc_image {
	position: relative;
}

.pc_image div {
	
}

.pc_tl {
	background: url('pc_tl.png') no-repeat left top;
}

.pc_tr {
	background: url('pc_tr.png') no-repeat right top;
}

.pc_bl {
	background: url('pc_bl.png') no-repeat left bottom;
}

.pc_br {
	background: url('pc_br.png') no-repeat right bottom;
}