콤보박스 자동 확장하기

1 2 3 4 5 6 7 8 9

마우스를 올리면 자동으로 확장됩니다.

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<TABLE border="0" bgcolor="black">
  <TR>
    <TD width="100" height="25" valign="top" bgcolor="white">
      <SELECT  style='width:50'
            NAME="aaaaa" style="position:absolute"
            onmouseover="this.style.zIndex=2;this.size=this.length"
            onmouseout="this.size=1;this.style.zIndex=0"
            onClick="this.size=1;this.style.zIndex=0">
        <option value="1">1</option>
        <option value="2">2</option>
        <option value="3">3</option>
        <option value="4">4</option>
        <option value="5">5</option>
        <option value="6">6</option>
        <option value="7">7</option>
        <option value="8">8</option>
        <option value="9">9</option>
      </SELECT>
    </TD>
    <TD bgcolor="white">마우스를 올리면 자동으로 확장됩니다.</TD>
  </TR>
</TABLE>