<form name="orderForm">
 <select name="baesong_ji"></select>
</form>

<script>
 for(i=1; i < 3; i++) {
  document.orderForm.baesong_ji.options[i] = new Option(i,i);
 }
</script>

 

new Option(i,i);   첫번째 i=value값 / 두번째 i= 출력값