Update Info

gistfile1.js

function updateInfo(row,reply,column,fieldanswer) {
  var current= sheet.getRange(row.id+2, column).getValue();
  var updated= (fieldanswer || current);
  
  if (current != updated) {
      // update field
      sheet.getRange(row.id+2, column).setValue(updated);
      
      sheet.getRange(row.id+2, column).setBackgroundColor('green');
  }
}