<script language="javascript">

function addSel(o,o1,o2)

{

    o.options.add(new Option(o2.value,o1.value));

}

function delSel(o)

{

    o.options.remove(o.selectedIndex);

    o.selectIndex=0;

}

function getValue(o)

{

    alert("Text :"+o.options[o.selectedIndex].text+"\nValue:"+o.value);

}

</script>

<select id="sel">

<option value="1">11111</option>

<option value="2">22222</option>

</select>

value:<input id="addV" type="text">

text:<input id="addT" type="text">

<input type="button" value="添加" οnclick="addSel(document.getElementById('sel'),document.getElementById('addV'),document.getElementById('addT'))">

<input type="button" value="删除" οnclick="delSel(document.getElementById('sel'))">

<input type="button" value="取值" οnclick="getValue(document.getElementById('sel'))">