#zoneprincipale div.avion
{
background-color: #000000;
background-image: url(http://trouvephoto.com/res/avion.gif);
background-repeat: no-repeat;
background-position: bottom left;
}
#zoneprincipale div.avion2
{
background-color: #000000;
background-image: url(http://trouvephoto.com/res/avion.gif);
background-repeat: no-repeat;
background-position: bottom center;
}