/* =Button
-------------------------------------------------------------- */
.column-meta .column_label .inner .filtering:before {
	content: "";
	display: inline-block;
	background: transparent url(../images/filter.png) no-repeat 0 0;
	width: 15px;
	height: 15px;
}
.opened .column-meta .column_label .inner .filtering:before {
	background-position: -15px 0;
}
.column-meta .column_label .inner .filtering.on:before {
	background-position: -30px 0;
}