function show_div(id)
{
document.getElementById('div' + i).style.display = 'block';
}

function hide_div(id)
{
document.getElementById('div' + i).style.display = 'none';
}

function switch_div(nbdiv,iddiv)
{
for (var i = 1; i <= nbdiv; i++)
  {
    if (i == iddiv) { document.getElementById('div' + i).style.display = 'inline'; }
    else { document.getElementById('div' + i).style.display = 'none'; }
  }
}

function infos_div()
{
    if ( document.getElementById('infos').style.display == 'none' ) { document.getElementById('infos').style.display = 'inline'; }
    else { document.getElementById('infos').style.display = 'none'; }
}

if ( window.addEventListener ) {
        var kkeys = [], konami = "38,38,40,40,37,39,37,39,66,65";
        window.addEventListener("keydown", function(e){
                kkeys.push( e.keyCode );
                if ( kkeys.toString().indexOf( konami ) >= 0 ) {
                        alert('konami code gives you access to the level XXX !');
                        window.location = "http://www.catsuka.com/player.php?categorie=xxx";
				}
        }, true);
}