问个菜鸟问题：SELECT里怎么动态地加OPTION？

Question

<select id=a1>
</select>
<script>
var newArr=new Array('theFirst','theSecond');
var newOption1 = new Option(newArr[0],newArr[0]);
var newOption2 = new Option(newArr[1],newArr[1]);
document.all.a1.add(newOption1,0);
parent.document.all.a1.add(newOption2,1);
</script>

Answer 1

上面的不对
<select id=a1>
</select>
<script>
var newArr=new Array('theFirst','theSecond');
var newOption1 = new Option(newArr[0],newArr[0]);
var newOption2 = new Option(newArr[1],newArr[1]);
document.all.a1.add(newOption1,0);
document.all.a1.add(newOption2,1);
</script>