var myBtn = document.getElementById("myBtn2019");
var myul = document.getElementById("myul2019");
if (myul.style.display == "none") {
myul.style.display = "block";
myBtn.innerHTML = "➕";
myBtn.style.transform = "rotateZ(45deg)";
} else {
myul.style.display = "none";
myBtn.innerHTML = "➿";
myBtn.style.transform = "rotateZ(0deg)";
}
}
})();