clearRightOf.js

function clearRightOf(field) {
  if (!window.confirm('Clear cells right of trigger field?')) { return; }
  window.lastClearRightTrigger = this;
  var right = jQuery(field).parent().nextAll();
  right.find('input').val('');
  right.find('select').prop('selectedIndex', 0);
  window.alert('Should be cleared now, look before you then click ok.');
}

jQuery(document).ready(function () {
  jQuery('table#tblProducts').on('change', 'select, input.pnm',
    function () { clearRightOf(this); });
});