function showPriceList(elem)
{
  document.getElementById("plist" + elem).className = "plist-visible";
  document.getElementById("bshow" + elem).className = "plist-hide-button";
  document.getElementById("bhide" + elem).className = "plist-show-button";
  document.getElementById("bhide" + elem).style.zIndex = 30;
}

function hidePriceList(elem)
{
  document.getElementById("plist" + elem).className = "plist-hidden";
  document.getElementById("bshow" + elem).className = "plist-show-button";
  document.getElementById("bhide" + elem).className = "plist-hide-button";
  document.getElementById("bhide" + elem).style.zIndex = 10;
}