正则过滤SELECT

<textarea id="textarea1">
<DIV>我不想把所有的标签都清除掉.我只想清除"<select></select>"中间的所有内容应该怎么写呢?
{
<select name="select">
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
</select>
}
</DIV>
</textarea>
<script language=javascript>
var str=document.getElementById("textarea1").value
re=/<select([\s\S]+?)<\/select>/gi
alert(str.replace(re,""))
</script>