function changeBg(div, size){
	if (size == ""){
		size = 13;
		shadow = "";
	}else
		shadow = "8px 4px 1px black";
	
	div.style.fontSize = size;
	div.style.textShadow = shadow;
}

function repondre(idr, link){
	reponse = {
			1 : "reponse 1",
			2 : "reponse 2",
			3 : "reponse 3",
			4 : "reponse 4",
			5 : "reponse 5",
			6 : "reponse 6",
			7 : "reponse 7",
	};
	
	document.getElementById('reponse').style.display = 'block';
	document.getElementById('reponse').innerHTML = reponse[idr];
	for (i=0; i < document.getElementsByName('question').length; i++){
		document.getElementsByName('question')[i].style.fontWeight = 'normal';
	}
	link.style.fontWeight= 'bolder';
}