how to make a javascript function that prevent any option to be selected twice to html select option code example

Example: javascript prevent value change in select option

old_value = $('#select :selected').val();
$('#select').change(function() {
  if($(this).val() == 'option 3') {//your specific condition
     $('#select').val(old_value);
  } else {
    old_value = $('#select :selected').val();
  }
});