function majDate() {
	//alert(document.getElementById("selDateArrivee").length);
	if(document.getElementById("selDateArrivee").selectedIndex+1<document.getElementById("selDateArrivee").length) {
		val = 1;
	}else {
		val = 0;
	}
	nextWeek = document.getElementById("selDateArrivee").selectedIndex+val;
	document.getElementById("selDateDepart").selectedIndex = nextWeek ;
}