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直接附上代码

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<script language="javascript">
    function changeF()
    {
       document.getElementById('makeupCo').value=
       document.getElementById('makeupCoSe').options[document.getElementById('makeupCoSe').selectedIndex].value;
    }
</script>

<span style="position:absolute;border:1pt solid #c1c1c1;overflow:hidden;width:188px;
    height:19px;clip:rect(-1px 190px 190px 170px);">
<select name="makeupCoSe" id="makeupCoSe" style="width:190px;height:20px;margin:-2px;" onChange="changeF();">
    <option id='1' value='test1'>test1</option>
    <option id='2' value='test2'>test2</option>
    <option id='3' value='test3'>test3</option>
</select>
</span>

<span style="position:absolute;border-top:1pt solid #c1c1c1;border-left:1pt
    solid #c1c1c1;border-bottom:1pt solid #c1c1c1;width:170px;height:19px;">
    <input type="text" name="makeupCo" id="makeupCo" value="请选择或输入" style="width:170px;height:15px;border:0pt;">
</span>

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