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.s1{falcon:expression(selectedIndex=0)}
</style>
<select class="s1">
<option>1</option>
<option>2</option>
</select>
<select >
<option>1</option>
<option>2</option>
</select>