怎样删除下拉列表框中的某一项

Question

http://lucky.myrice.com/javascriptexam/add_del_Select.htm

Answer 1

<select onchange="this.removeChild(this.options[this.selectedIndex])">
<option>AAAA
<option>BBBB
<option>VCCC
<option>DDDD
</select>

Answer 2

<SELECT NAME="Cats" SIZE="1">
<OPTION VALUE="1">Calico
<OPTION VALUE="2">Tortie
<OPTION VALUE="3" SELECTED>Siamese
</SELECT>
<button onclick="if(Cats.childNodes.length>0) Cats.removeChild(Cats.childNodes(0));">Remove</button>

Answer 3

document.formName.boxName.options[i]=null
formName:表单名字
boxName：下拉菜单名字
i：要删除的这一项