.arw_T,
.arw_B{
	display:inline-block;
	width:15px;
	height:10px;
	overflow:hidden;
}

.arw_T:hover,
.arw_B:hover{
	background-position:0px 0px;
}

.arw_T{ background:url( ../img/Arrow_T.png) no-repeat 0px -10px; }
.arw_B{ background:url( ../img/Arrow_B.png) no-repeat 0px -10px; }