title: how to change select option's height and hover background color
body: <pre><code>&lt;select name="mySelect" class="select-min"&gt;
     &lt;option value="0"&gt;please select&lt;/option&gt;
     &lt;option value="1"&gt;item1&lt;/option&gt;
     &lt;option value="2"&gt;item2&lt;/option&gt;
     &lt;option value="3"&gt;item3&lt;/option&gt;
     &lt;option value="4"&gt;item4&lt;/option&gt;
     &lt;option value="5"&gt;item5&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>I want to change the option's height and background color when mouse over the option,I tried many times ,but failed</p>