function sP(stan) {
for (var i = 1; i < 5; i++){
document.getElementById("m"+i+"").className="display_normal";
document.getElementById("m"+i+"1").className="display_none";
document.getElementById("m"+i+"2").className="display_none";
}
document.getElementById("m"+stan+"").className="display_none";
document.getElementById("m"+stan+"1").className="display_normal";
document.getElementById("m"+stan+"2").className="display_normal";
}
function sPa(stan){document.getElementById("m"+stan+"").src="menu/"+stan+"_1.png";}
function sPb(stan){document.getElementById("m"+stan+"").src="menu/"+stan+".png";}