.pos_img1 {
  position: absolute;
  top: 0px;
  left: 450px;
}

.pos_text1 {
  position: absolute;
  top: 0px;
  left: 0px;
  width: 400px;
}

.gauche {
	float: left;
	margin:20px;
	}

.droite {
	float: right;
	margin:20px;
	}