var sbpht1 = new Array();
var sbpht2 = new Array();
for(var i=1;i<=6;i++){
	sbpht1[i] = new Image();
	sbpht1[i].src = "../img/stb" + i + ".png";
	sbpht2[i] = new Image();
	sbpht2[i].src = "../img/sb" + i + ".png";
}
function sChg1(nb){
	var mtd = "stb" + nb;
	document.getElementById(mtd).src = sbpht1[nb].src;
}
function sChg2(nb){
	var mtd = "stb" + nb;
	document.getElementById(mtd).src = sbpht2[nb].src;
}