我有这个代码例如:
<select >
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
<option value="audi">Audi</option>
<option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option><option value="audi">Audi</option>
</select>
它的下落对我来说太长了。是否可以设置下拉框的高度。就像将其设置为4,然后如果条目大于4,则滚动条将显示。