a.sb,
.sb a {
	width: 32px;
	height: 32px;
	background-repeat: no-repeat;
	background-position: center center;
	text-indent: -900em;
	color: #333;
	text-decoration: none;
	line-height: 100%;
	white-space: nowrap;
	display: inline-block;
	position: relative;
	vertical-align: middle;
	margin: 0 2px 5px 0;
}
/* for IE */
*:first-child+html a.sb,
*:first-child+html .sb a {
	text-indent: 0;
	line-height: 0;
	font-size: 0;
	overflow: hidden;
}

a.sb.elearning,
.sb a.elearning {
	background-image: url(../img/elearning.png);
	width: 114px;
	height: 54px;
}

a.sb.facebook,
.sb a.facebook {
	background-image: url(../img/facebook.png);
	width: 54px;
	height: 54px;
}

a.sb.googleplus,
.sb a.googleplus {
	background-image: url(../img/googleplus.png);
}

a.sb.linkedin,
.sb a.linkedin {
	background-image: url(../img/linkedin.png);
}