a.bouton:link{
width:200px;
height:20px;
text-decoration:none;
display:block;
background-color:#0000FF;
color:white;
text-align:center;
font-size : 100%;
padding:5px;
border-style:outset;
border-width:2px;
border-color:silver}

a.bouton:visited{
width:200px;
height:20px;
text-decoration:none;
display:block;
color:white;
text-align:center;
font-size : 100%;
background-color:#0066FF;
padding:5px;
border-style:outset;
border-width:2px;
border-color:silver}

a.bouton:hover{
width:200px;
height:20px;
text-decoration:none;
display:block;
color:white;
text-align:center;
font-size : 100%;
color:#FFFF00 ;
background-color:#003300;
padding:5px;
border-style:inset;
border-width:2px;
border-color:silver}

.bouton{text-align:center;padding:5px;}