原視窗開啟
<select onChange="location.href=this.value">
<option value="../en/" selected>EN</option>
<option value="../zh-tw/" selected>繁中</option>
</select>
新視窗開啟
<select onChange="window.open(this.value)">
<option value="../en/" selected>EN</option>
<option value="../zh-tw/" selected>繁中</option>
</select>
