// ====== Ecran ======
width=screen.width;
height=screen.height;

if (width < 1000) 
{
defi=1;
document.write('<LINK rel="stylesheet" href="1_system/styles8.css">');
}
else
{
defi=2;
document.write('<LINK rel="stylesheet" href="1_system/styles1.css">');
}