function changeColor(id) {
element = document.getElementById(id);
element.style.background = "#f4f7f7";
}

function nColor(id1) {
element1 = document.getElementById(id1);
element1.style.background = "";
}

function changeColor1(id) {
element = document.getElementById(id);
element.style.background = "#36383A";
}

function changeColor2(id) {
element = document.getElementById(id);
element.style.background = "#2A292A";
}