var timeoutID = null;
var currentImgID = null;
var currentHasMenu = false;

function show(imgID, hoverSrc, hasMenu) {
  if (timeoutID != null) {
    window.clearTimeout(timeoutID);
    timeoutID = null;
  }

  if (imgID != currentImgID) {
    if (currentImgID != null) hide();
    currentImgID = imgID;
    currentHasMenu = hasMenu;
    var img = document.getElementById(imgID);
    img.setAttribute("origSrc", img.getAttribute("src"));
    img.setAttribute("src", hoverSrc);
    if (hasMenu) {
      img = document.getElementById(imgID + "-menu");
//    img.removeAttribute("style"); No IE support...
      img.style.display = "block";
    }
  }
}

function hide(timed) {
  if (timed) {
    if (timeoutID != null)
      window.clearTimeout(timeoutID);
    timeoutID = window.setTimeout("hide()", 400);
  } else {
    var img = document.getElementById(currentImgID);
    img.setAttribute("src", img.getAttribute("origSrc"));
    img.removeAttribute("origSrc");
    if (currentHasMenu) {
      img = document.getElementById(currentImgID + "-menu");
//    img.setAttribute("style", "display:none"); No IE support...
      img.style.display = "none";
    }
    currentImgID = null;
  }
}

function pop(url) {
  window.open(url, "map", "width=420,height=570,resizable").focus();
  return false;
}