title: How to apply css style for HTML element using Mootools
body: <p>How can we hide all list element from first form in following html structure using mootools</p>
  
  <pre><code>&lt;form method="post" action="/signup" class="global_form" enctype="application/x-www-form-urlencoded"&gt;
  &lt;div&gt;
      &lt;div&gt;
          &lt;ul class="form-errors"&gt;    
              &lt;li&gt;First Name
                  &lt;ul class="errors"&gt;
                      &lt;li&gt;Please provide a valid answer for this field.&lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/li&gt;
              &lt;li&gt;Last name
                  &lt;ul class="errors"&gt;
                      &lt;li&gt;Please provide a valid answer for this field.&lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/li&gt;
          &lt;/ul&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  &lt;/form&gt;
  
  
   &lt;form method="post" id="user_form_login" action="/login" class="global_form" enctype="application/x-www-form-urlencoded"&gt;
  &lt;div&gt;
      &lt;div&gt;
          &lt;ul class="form-errors"&gt;    
              &lt;li&gt;Uername
                  &lt;ul class="errors"&gt;
                      &lt;li&gt;Please provide a valid answer for this field.&lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/li&gt;
              &lt;li&gt;Password
                  &lt;ul class="errors"&gt;
                      &lt;li&gt;Please provide a valid answer for this field.&lt;/li&gt;
                  &lt;/ul&gt;
              &lt;/li&gt;
          &lt;/ul&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  &lt;/form&gt;
  </code></pre>