var lastFocus;

function setLastFocus(element) {
  lastFocus=element;
  changeborder(element,'on');
}

function removeLastFocus(element) {
  if (lastFocus==element) { lastFocus=eval("document"); }
  changeborder(element,'off');
}


function changeborder(box,onoff) {
  switch(onoff) {
    case 'on': box.className='bdr';
                     break;
    case 'off': if (lastFocus!=box) {
                  box.className='nbdr';
                }
                break;
    default: break;
  }
}