function SetActive(who)
{
  theTable = document.getElementById('tpurchase');
  theTable.style.backgroundColor = 'FFFFFF';
  theDiv = document.getElementById('dpurchase');
  theDiv.style.display = 'none';

  theTable = document.getElementById('trent');
  theTable.style.backgroundColor = 'FFFFFF';
  theDiv = document.getElementById('drent');
  theDiv.style.display = 'none';

  theTable=document.getElementById('t' + who);
  theTable.style.backgroundColor = 'FDEDEA';
  theDiv=document.getElementById('d' + who);
  theDiv.style.display = 'inline'; 
};