如何不用disabled而使select不能下拉或不能改变原有的值
<select onchange=this.selectedIndex=i id=s>
<option>1
<option selected>2
<option >3
</select>
<script>
var i=s.selectedIndex
</script>
<option>1
<option selected>2
<option >3
</select>
<script>
var i=s.selectedIndex
</script>
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