法1:
<select onchange="this.selectedIndex=1">
<option>1</option>
<option selected>2</option>
<option>3</option>
</select>法2:
<style>
select{falcon:expression(selectedIndex=0)}
</style>
<select>
<option>1</option>
<option>2</option>
</select>
<select >
<option>1</option>
<option>2</option>
</select>
法3:
<style>
select.readonly{meizz:expression(selectedIndex=0)}
</style><select class="readonly">
<option>1</option>
<option>2</option>
</select><select>
<option>1</option>
<option>2</option>
</select>
<select onchange="this.selectedIndex=1">
<option>1</option>
<option selected>2</option>
<option>3</option>
</select>法2:
<style>
select{falcon:expression(selectedIndex=0)}
</style>
<select>
<option>1</option>
<option>2</option>
</select>
<select >
<option>1</option>
<option>2</option>
</select>
法3:
<style>
select.readonly{meizz:expression(selectedIndex=0)}
</style><select class="readonly">
<option>1</option>
<option>2</option>
</select><select>
<option>1</option>
<option>2</option>
</select>
<option value="a" selected>a</option>
<option value="b">b</option>
<option value="c">c</option>
<option value="d">d</option>
</select>
<option value="a">a</option>
<option value="b" selected>b</option>
<option value="c">c</option>
<option value="d">d</option>
</select>