var pos = 0;
function passage(n){
if(n>=0){
p=n;
}
document.getElementById('contenu').style.backgroundPosition=pos+"px 0";
if(pos > -375){
pos=pos-15;
clic = window.setTimeout("passage();",1);
}else{
window.location.href="monde_"+p+".php";

}
}
function passage2(n){
if(n>=0){
p=n;
}
document.getElementById('contenu').style.backgroundPosition=pos+"px 0";
if(pos > -375){
pos=pos-15;
clic = window.setTimeout("passage2();",1);
}else{
window.location.href="premonde_"+p+".php";
}
}

function change_p(a){//change photo et legende

var cpt, b, c ;
for (cpt=1; cpt<10; cpt++){
	b='p'+cpt;
	if(document.getElementById(b)){
		document.getElementById(b).style.display='none';//cache toutes photos
	}	
}

c='p'+a;
document.getElementById(c).style.display='block';//montre la photo choisie

}