/* botao 1 */
#seu_botao {
	clear: both;
	position:relative;
	display:block;
	height: 35px;
	width: 35px;
	background:url(../imagens/redes_sociais/facebook1.png) no-repeat;
	background-position:0 0;
	cursor: pointer;
}	
#seu_botao span.hover {
	position: absolute;
	display: block;
	height: 35px;
	width: 35px;
	margin-left:0px;
	margin-top:0px;
	background: url(../imagens/redes_sociais/facebook2.png) no-repeat;
	background-position: bottom;
}

/* botao 2 */
#outro_botao {
	clear: both;
	position:relative;
	display:block;
	height: 35px;
	width: 35px;
	background: url(../imagens/redes_sociais/twitter.png) no-repeat;
	background-position:0 0;
	cursor: pointer;
}	
#outro_botao span.hover {
	position: absolute;
	display: block;
	height: 35px;
	width: 35px;
	margin-left:0px;
	margin-top:0px;
	background: url(../imagens/redes_sociais/twitter2.png) no-repeat;
	background-position: bottom;
}