title: How to add vertical gradient using css?
body: <p>I have vertical submenu as under:</p>
  
  <pre><code>&lt;div id="dropdown_menu" class="menu"&gt;
  &lt;ul&gt;
  &lt;li&gt; &lt;a&gt;First Link&lt;/a&gt;&lt;/li&gt;
  &lt;li&gt; &lt;a&gt;Second Link&lt;/a&gt;&lt;/li&gt;
  &lt;/ul&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>I am putting bottom piece of background in css class 'menu'., top slice of background in .menu ul. Now, I have one vertical gradient that changes color from top to down (in whole vertical menu) and therefore I cannot put it in .menu ul li. Is it possible to add the vertical gradient without making any change to html?</p>