// shared js functions ...

function showDiv(divId,startDiv,maxDivs)
{
  hideAllDivs(startDiv,maxDivs);
  var targetDiv = document.getElementById(divId);
  if (targetDiv) {
    //targetDiv.style.visibility = '';
    targetDiv.style.display    = '';
  }
}

function hideAllDivs(minDivNo,maxDivs)
{
  for (var i=minDivNo;i<=maxDivs;i++) {
    var targetDiv = document.getElementById("d"+i.toString());
    if (targetDiv) {
      //targetDiv.style.visibility = 'hidden';
      targetDiv.style.display    = 'none';
    }
  }
}