title: How to change the background of selected link?
body: <p>I am using <code>&lt;ul&gt;&lt;li&gt;&lt;/li&gt;&lt;/ul&gt;</code> 
  I want to change the background of the selected <code>&lt;li&gt;</code> or page. 
  Please guide me which solution is best for this and please also provide any helping material.</p>
  
  <p>Thanks. </p>