function unhideflight() {
  var flight = [5];
  var dep = [5];
  var arr = [5];
  var dat = [5];
  var tm = [5];
  var flx = [5];
  
  for (i=5; i<=20; i++) {
    flight[i] = document.getElementById("flight"+i);
    dep[i] = document.getElementById("dep"+i);
    arr[i] = document.getElementById("arr"+i);
    dat[i] = document.getElementById("dat"+i);
    tm[i] = document.getElementById("tm"+i);
    flx[i] = document.getElementById("flx"+i);
  }
  
  var unhidden = false;
  var i = 5;
  while (unhidden == false) {
    if (flight[i].className == 'unhidden') {i++;}
    else {unhidden = true;}
  }
  
  flight[i].className = 'unhidden';
  dep[i].className = 'unhidden';
  arr[i].className = 'unhidden';
  dat[i].className = 'unhidden';
  tm[i].className = 'unhidden';
  flx[i].className = 'unhidden';
  
  var currentitem = document.getElementById("showmore"+i);
  currentitem.className = 'hidden';
  if (i != 20) {
    j=i+1;  
    var item = document.getElementById("showmore"+j);
    item.className = 'unhidden';
  }
  
}