function unpack_roll_down(elem) {
  document.getElementById(elem).className                = "roll-down unpacked";

ContentSizeAdjust();
return;
}

function pack_roll_down(elem) {
  document.getElementById(elem).className                = "roll-down packed";
ContentSizeAdjust();
return;
}

function toggle_roll_down(elem) {
  if (document.getElementById(elem).className == "roll-down packed") {
  document.getElementById(elem).className = "roll-down unpacked";
} else if (document.getElementById(elem).className == "roll-down unpacked") {
  document.getElementById(elem).className = "roll-down packed";
}
ContentSizeAdjust();
return;
}