body {
margin: 0; /* pour éviter les marges */
text-align: center; /* pour corriger le bug de centrage IE */
}
.global {
margin-left: auto;
margin-right: auto;
width: 670px;
text-align: left; /* on rétablit l'alignement normal du texte */
}
.header{
border: 2px solid black;
text-align:center;
display: block;
position: absolute;
top:5px;
background:url(img/fond_arbre.jpg);
height:125px;
width:650px;
list-style-type: none  
}
.conteneur{
border: 2px solid black;
background:#F0F0F0;
width: 650px;
height: 400px;
display: block;
position: absolute;
top:170px
}
.no{
background:#F8F8F8;
Width: 650px;
height: 30px;
text-align:center;
display: block;
position: absolute;
top: 570px
}
.ssHeader{
background:#F8F8F8;
text-weight:bold;
text-align:center;
width: 650px;
height: 10px;
display: block;
position: absolute;
top: 142px;
font-family: verdana, arial, sans-serif ;
font-size:14;
color: black 
}
.menu_g{
background:#F0F0F0;
width:24%;
height: 85%;
display: block;
text-align:center;
position: absolute;
margin-left: 0.5%;
top:0.5%
}
.separateur{
background:#000000;
display: block;
position: absolute;
width: 0.3%;
height:90%;
left: 25%;
top: 5%;
}
a{
color:#452189 ;
font-size:16;
text-decoration:none
}
a:hover{
color:#452189 ;
text-decoration:underline overline;
font-size:17
}
.texte{
background:#F0F0F0;
display: block;
position: absolute;
width: 70%;
height:90%;
left: 27.5%;
top: 7%;
font-size:18
}
.texte2{
text-align:center;
font-size:14
}
.h2{
font-size:15;
text-decoration:underline;
font-weight::bold
}
.fl{
background:#F0F0F0;
display: block;
position: absolute;
width: 85px;
height:105px;
left: 555px;
top: 290px;
font-size:18
}
.error{
background-image:url(img/error.jpg);
background-position:center;
background-repeat:no-repeat;
background-color:#f0f0f0;
width: 100%;
height: 100%;
display: block;
position: absolute;
text-align:center;
font-size:18
}