var nbrCardsChosen = 0;
var passEdits = false;

function editCardsChosen() {
  nbrCardsChosen = 0;
  passEdits = false;
  var nbrChkBoxes = document.recommendForm.chkProductId.length;

  for (var indx = 0; indx < nbrChkBoxes; indx++) {
    if (eval("document.recommendForm.chkProductId[" + indx + "].checked") == true) {
      nbrCardsChosen += 1;
    }
  }		

  if (nbrCardsChosen == 0) {
    alert("Please select at least one card to compare.");
    return;
  }
  
  passEdits = true;
  return;
}