function showElem(item1,item2) {
   var i = document.getElementById(item1);
   i.style.display="inline";
   var i = document.getElementById(item2);
   i.style.display="inline";
  }

  function hideElem(item1,item2) {
   var i = document.getElementById(item1);
   i.style.display="none";
   var i = document.getElementById(item2);
   i.style.display="none";
  }