// Wen-Jie Zheng
// 05/31/06

function expand(img, cell) 
{
  var f = document.getElementById(cell);
  if (f.style['display'] == "none") 
  {
    f.style['display'] = '';
    img.src = "../arrows/arrow_up.gif";
  }
  else
  {
    f.style['display'] = "none";
    img.src = "../arrows/arrow_down.gif";
  }
  return false;
}