title: How to use Extended Choice Parameter plugin for check box
body: <p>Currently I am using Choice parameter to input the hostname in a drop-down like below.</p>
  
  <ul>
  <li>server1</li>
  <li>server2</li>
  <li>server3</li>
  </ul>
  
  <p>I am include the selected value in property.</p>
  
  <pre><code>Server=%Hostname%
  </code></pre>
  
  <p>Also I am invoking the same in post build <code>actions--&gt;Email Notification--&gt;Subject--&gt;Login</code> success for <code>$Hostname</code>.</p>
  
  <p>But my requirement is instead of a drop-down I need a check box option for server1, server2 &amp; server3 so that I can select multiple servers at one time and build the job.</p>
  
  <p>Also I need to include the hostname in property and in email subject. But the Email subject should not contain the actual hostname (server), instead it has to be a different name.</p>
  
  <p>Let's say,</p>
  
  <pre><code>server1 = DEV
  server2 = QA
  </code></pre>
  
  <p>The property should take "server1" value and the email suject should take "DEV". </p>
  
  <p>I am trying to use Extended Choice Parameter plugin, but I am stuck, so any help would be really appreciated!</p>