.mercureaux {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 15px;
	font-weight: bolder;
	color: #FFFFFF;
	text-decoration:none;
}
.txt {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 12px;
	color: #000000;

}.txtgras {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 12px;
	font-weight: bold;
	color: #000000;


}
.titres {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 18px;
	font-weight: bold;

}
.sstitres {

	font-family: Arial, Helvetica, sans-serif;
	font-size: 15px;
	font-weight: bold;
}
.tableaux {
	border: 1px solid #66CC33;
}
.som {
	text-decoration: none;
}

dl, dt, dd, ul, li {
margin: 0;
padding: 0;
list-style-type: none;
}
#menu {
position: absolute; /* placement du menu, à modifier selon vos besoins */
top: 308px;
left: (screen.width-largeur)/2;
z-index:100;
width: 800px; /* correction pour Opera */
}
#menu dl {
float: left;
width: 160;
}
#menu dt {
	color: #FFFFFF;
	font-family: Arial, Helvetica, sans-serif;
	font-size: 15px;
	font-weight: bolder;
	text-decoration:none;
	cursor: pointer;
	text-align: center;
	font-weight: bold;
	background: #71bf44;
	border: 1px solid gray;
	margin: 1px;
	background-color: #71bf44;
}
#menu dd {
	position:absolute;
	display: none;
	border: 1px solid gray;
	font-family: Arial, Helvetica, sans-serif;
	font-size: 12px;
	width: 160;
}
#menu li {
text-align: center;
background: #fff;
}
#menu li a, #menu dt a {
color: #000000;
text-decoration: none;
display: block;
height: 100%;
border: 0 none;
}
#menu li a:hover, #menu li a:focus, #menu dt a:hover, #menu dt a:focus {
background: #0099FF;
}
#site {
position: absolute;
z-index: 1;
top : 70px;
left : 10px;
color: #000;
background-color: #ddd;
padding: 5px;
border: 1px solid gray; 
}