var inDT = false;
  var inDD = false;

  function overDT(name) {
    document.getElementById(name).style.display = 'block';
    inDT = true;
  }

  function outDT(name) {
    document.getElementById(name).style.display = 'none';
  }
  
  function overDD(name) {
    document.getElementById(name).style.display = 'block';   
  }

  function outDD(name) {
    document.getElementById(name).style.display = 'none';
  }