function kigen(){
	var myDate = new Date();
	var yy = myDate.getYear();
	if (yy < 1900) yy += 1900;
	yy = String(yy);
	var mm = myDate.getMonth() + 1;
	mm ++;
	document.getElementById("kigen").innerHTML = "※有効期限" + yy.substring(2, 4) + "年" + mm + "月末";
}