/*Botão transição normal*/
.button {
	width:140px;
	height:45px; 
	display:block;
	background-image:url(../imagens/btleiamais.png); 
	background-position: top;
}

.button:hover{
	width:140px;
	background-position: bottom;
	height:45px;
	background-image:url(../imagens/btleiamais.png) no repeat;
}


/*Botão transição fade*/
.fbutton {
	position:relative;
	display:block;
	height: 34px;
	width: 110px;
	background:url(../imagens/btleiamais.png) no-repeat;
	background-position: top;
}

.fbutton span.hover { /*notice the different class: span.hover*/
	position: absolute;
	display: block;
	height: 35px;
	width: 110px;
	background: url(../imagens/btleiamais.png) no-repeat;
	background-position: bottom;
}