// A function for setting the horizontal position of an element
function setX(elem, pos) {
    // Set the ‘left’ CSS property, using pixel units
    elem.style.left = pos + “px”;
}

// A function for setting the vertical position of an element
function setY(elem, pos) {
    // Set the ‘left’ CSS property, using pixel units
    elem.style.top = pos + “px”;
}