// NAV
if(document.images){

// NAVIGATION GENERALE
nav1 = new Image; nav1.src = "images/nav/bout01.gif";
nav1on = new Image; nav1on.src = "images/nav/bout01on.gif";
nav2 = new Image; nav2.src = "images/nav/bout02.gif";
nav2on = new Image; nav2on.src = "images/nav/bout02on.gif";
nav3 = new Image; nav3.src = "images/nav/bout03.gif";
nav3on = new Image; nav3on.src = "images/nav/bout03on.gif";
nav4 = new Image; nav4.src = "images/nav/bout04.gif";
nav4on = new Image; nav4on.src = "images/nav/bout04on.gif";
nav5 = new Image; nav5.src = "images/nav/bout05.gif";
nav5on = new Image; nav5on.src = "images/nav/bout05on.gif";
nav6 = new Image; nav6.src = "images/nav/bout06.gif";
nav6on = new Image; nav6on.src = "images/nav/bout06on.gif";
nav7 = new Image; nav7.src = "images/nav/bout07.gif";
nav7on = new Image; nav7on.src = "images/nav/bout07on.gif";
nav8 = new Image; nav8.src = "images/nav/bout08.gif";
nav8on = new Image; nav8on.src = "images/nav/bout08on.gif";
nav9 = new Image; nav9.src = "images/nav/bout09.gif";
nav9on = new Image; nav9on.src = "images/nav/bout09on.gif";
nav10 = new Image; nav10.src = "images/nav/bout10.gif";
nav10on = new Image; nav10on.src = "images/nav/bout10on.gif";
nav11 = new Image; nav11.src = "images/nav/bout11.gif";
nav11on = new Image; nav11on.src = "images/nav/bout11on.gif";

}