.flotante{
	position: fixed;
	z-index: 700;
	top: 200px;
	width:220px;
}
.caja{
	padding: 20px;
	margin: 1px;
	font-size: 12pt;
	color: #000;
	padding-left:85px;
	font-weight:bold;
}

.rojo{
		background-image: url("http://biodrein.com.mx/bio/img/btn_back1.png");
    background-repeat: no-repeat;
    background-position: left center;
}
.rojo:hover{
	width:220px; cursor:pointer;
}
.azul{
		background-image: url("http://biodrein.com.mx/bio/img/btn_back2.png");
    background-repeat: no-repeat;
    background-position: left center;
}
.azul:hover{
	width:220px; cursor:pointer;
}
.verde{
		background-image: url("http://biodrein.com.mx/bio/img/btn_back3.png");
    background-repeat: no-repeat;
    background-position: left center;
}
.verde:hover{
	width:220px; cursor:pointer;
}