function dd_on(ddid) {
  if (document.getElementById) {
    document.getElementById("dd_" + ddid).style.visibility = "visible";
    document.getElementById("pos_" + ddid).style.backgroundPosition = "0 -17px";
  }
}

function dd_off(ddid) {
  if (document.getElementById) {
    document.getElementById("dd_" + ddid).style.visibility = "hidden";
    document.getElementById("pos_" + ddid).style.backgroundPosition = "0 0";
  }
}

function setPageLoc(ddid) {
  if (document.getElementById) {
    document.getElementById("pos_" + ddid).style.backgroundPosition = "0 -17px";
  }
}