.bt-valider
{
	display: block;
	background: url('/images/commercant/bt-com-valider-FR.png') top left no-repeat;
	width: 78px; 
	height: 25px;
}

.bt-valider:hover
{
	background: url('/images/commercant/bt-com-valider-over-FR.png') top left no-repeat;
}