function toggleSecond() {
    document.getElementById("second").style.display = "block";
    document.getElementById("secondTab").style.backgroundPosition = "0 0";
    document.getElementById("first").style.display = "none";
    document.getElementById("firstTab").style.backgroundPosition = "0 -24px";
}
function toggleFirst() {
    document.getElementById("first").style.display = "block";
    document.getElementById("firstTab").style.backgroundPosition = "0 0";
    document.getElementById("second").style.display = "none";
    document.getElementById("secondTab").style.backgroundPosition = "0 -24px";
}