#content2{margin-top: 2%;margin-left: 25%;margin-right: 20%;width: 50%;padding: 20px;background: #ffffff;}
#menu{float:left;}
#header{text-align:center;}
#tligne{font-weight:bold;text-align:center;}
#ligne{text-align:center;}
.bouton_e{margin-right:2px;}
#content{margin-left: 5%;margin-top: 2%;}