function roll_over(nom) {
 document.images[nom].src="css/"+nom+"-s.gif";
}


function diaporama() {
 window.open("diaporama.htm", "Antipodes", "directories=no, menubar=no, status=no, scrollbars=no, location=no, fullscreen=yes");
}
function roll_out(nom) {
 document.images[nom].src="css/"+nom+".gif";
}