function showTable(num) {
s='lingo'+num;
document.getElementById(s).style.display='block';
}

function hideTable(num) {
s='lingo'+num;
document.getElementById(s).style.display='none';
}

function showTable5(num) {
  var s = '';
  for (var i=1; i <= 5; i++) {
    if (num==i) {
      s = 'lingo'+i;
      document.getElementById(s).style.display = 'block'; }
	else {
      s = 'lingo'+i;
      document.getElementById(s).style.display = 'none'; }
  }
}
function showTable3(num) {
  var s = '';
  for (var i=1; i <= 3; i++) {
    if (num==i) {
      s = 'lingo'+i;
      document.getElementById(s).style.display = 'block'; }
	else {
      s = 'lingo'+i;
      document.getElementById(s).style.display = 'none'; }
  }
}