title: twitter bootstrap alert hide on initialization
body: <p>I am using twitter bootstrap for my alerts and I want an alert to appear when there is an error in the inputs. I can hide it on initialization and show it once an error occurs. But after that the alert disappears again. is there any way to ensure that the alert stays there until the correct input is given</p>
  
  <pre><code>&lt;div class="span4"&gt;  
                  &lt;div class="alert alert-error  fade in" id = "user_name_exist" &gt;  
                     &lt;button type="button" class="close"&gt;×&lt;/button&gt;
                    &lt;h4 class="alert-heading"&gt;Username error!&lt;/h4&gt;  
                      The username entered is used by another user. Please choose another one!
                  &lt;/div&gt;  
  &lt;/div&gt;  
  </code></pre>
  
  <p>anyone can help me?</p>