function secBoard(n)
{
  for( i = 0; i < 5; i++ )
  {
    tab = document.getElementById('secheader' + i);
    block = document.getElementById('secTable' + i);
    if( i == n )
    {
      tab.className = 'sec2' ;
      block.style.display = 'block' ;
    } else {
      tab.className = 'sec1' ;
      block.style.display = 'none' ;
    }
  }
}

function noBoard(n)
{
  for( i = 0; i < 3; i++ )
  {
    tab = document.getElementById('noheader' + i);
    block = document.getElementById('maTable' + i);
    if( i == n )
    {
      tab.className = 'no2' ;
      block.style.display = 'block' ;
    } else {
      tab.className = 'no1' ;
      block.style.display = 'none' ;
    }
  }
}