function ShowPopup(hoveritem, hoverid) {
    hp = document.getElementById(hoverid);

    // Set position of hover-over popup
    //hp.style.top = hoveritem.offsetTop + 18;
    //hp.style.left = hoveritem.offsetLeft + 20;

    // Set popup to visible
    hp.style.visibility = "Visible";
}

function HidePopup(hoverid) {
    hp = document.getElementById(hoverid);
    hp.style.visibility = "Hidden";
}