function showTab(tabToShow){
	for (var i=0;i<4;i++) {
		if (i == tabToShow) {
			document.getElementById('tab'+i).style.display = "block";
      document.getElementById('titre'+i).className = "active";
		} 
		else {
			document.getElementById('tab'+i).style.display = "none";
      document.getElementById('titre'+i).className = "onglet";
		}
	}
}
function closePop(){
	document.getElementById('popup_langue').style.display = 'none';
}
function openPop(){
	document.getElementById('popup_langue').style.display = 'block';
}
function openPop2(){
	document.getElementById('popup_langue').style.display = 'block';
}
function closePop2(){
	document.getElementById('popup_langue').style.display = 'none';
}