* html a:hover
{
visibility:visible
}
.bt1
{
	white-space: nowrap;
	display: block;
	width: 43px;
	height: 70px;
	background-image: url(btmarci-ov.gif);
	background-repeat: no-repeat;
	float: left;
	margin-top: 16px;
}

.bt1 a
{
display: block;
color: #000000;
font-size: 11px;
width: 43px;
height: 70px;
display: block;
float: left;
color: black;
text-decoration: none;
}

.bt1 img
{
width: 43px;
height: 70px;
border: 0
}
.bt1 a:hover img
{
visibility:hidden
}

.bt1 span
{
	cursor: pointer;
	display: none;
}




.bt2
{
	white-space: nowrap;
	display: block;
	width: 55px;
	height: 60px;
	background-image: url(btcompania-ov.gif);
	background-repeat: no-repeat;
	float: left;
	margin-top: 4px;
}

.bt2 a
{
display: block;
color: #000000;
font-size: 11px;
width: 55px;
height: 60px;
display: block;
float: left;
color: black;
text-decoration: none;
}

.bt2 img
{
width: 55px;
height: 60px;
border: 0
}
.bt2 a:hover img
{
visibility:hidden
}

.bt2 span
{
	cursor: pointer;
	display: none;
}





.bt3
{
	white-space: nowrap;
	display: block;
	width: 45px;
	height: 45px;
	background-image: url(btistoric-ov.gif);
	background-repeat: no-repeat;
	float: left;
}

.bt3 a
{
display: block;
color: #000000;
font-size: 11px;
width: 45px;
height: 45px;
display: block;
float: left;
color: black;
text-decoration: none;
}

.bt3 img
{
width: 45px;
height: 45px;
border: 0
}
.bt3 a:hover img
{
visibility:hidden
}

.bt3 span
{
	cursor: pointer;
	display: none;
}




.bt4
{
	white-space: nowrap;
	display: block;
	width: 49px;
	height: 53px;
	background-image: url(btintro-ov.gif);
	background-repeat: no-repeat;
	float: left;
	margin-top: 6px;
}

.bt4 a
{
display: block;
color: #000000;
font-size: 11px;
width: 49px;
height: 53px;
display: block;
float: left;
color: black;
text-decoration: none;
}

.bt4 img
{
width: 49px;
height: 53px;
border: 0
}
.bt4 a:hover img
{
visibility:hidden
}

.bt4 span
{
	cursor: pointer;
	display: none;
}