body {

    background-image:url(../images/bg-repeat-x-noir.jpg);
    background-repeat:repeat-x;
    
    width:auto; /* on rétablit l'alignement normal du texte */  
    margin:0px;
}

.colonne_gauche {
float:left;
width:100%;
height:auto;
background-color:#FFFFFF;
background-image:url(../images/colonne_gauche.jpg);
background-position: 0px 0px;
background-repeat:no-repeat;
}


