设置select在div中水平居中
<div style="position: relative">
<select class="select" style="text-align: center;text-align-last: center;">
<option name="areaId" value="1">测试</option>
</select>
</div>
垂直居中:
<div style="position: relative">
<select class="select" style="margin: auto; position: absolute;top: 0;left: 0;bottom: 0;right: 0;">
<option name="areaId" value="1">测试</option>
</select>
</div>