<select name="pets" id="pet-select">
<option value="">--Please choose an option--</option>
<option value="dog">Dog</option>
<option value="cat">Cat</option>
<option value="hamster">Hamster</option>
<option value="parrot">Parrot</option>
<option value="spider">Spider</option>
<option value="goldfish">Goldfish</option>
</select>
#pet-select {
appearance: none;
-moz-appearance: none;
-webkit-appearance: none;
}
效果图
