div#colonne1 {
	float: left;
	width: 300px;
        height: 600px;
	margin-right: 10px;
	background:#efef95
}
div#colonne2 {
	float: right;
	width: 300px;
        height: 600px;
	margin-left: 10px;
	background:#efef65
}
div#centre {
	overflow: hidden;
        height: 600px;    
	background:#efef80
}
p.p1 {
position:relative;
left:20px;

}

p.p2 {
position:relative;
left:170px;
position:relative;
top:-520px

}