title: Can't open modal bootstrap
body: <p>When I click link,</p>
  
  <pre><code>&lt;a href="#" data-toggle="modal" data-target="#report"&gt;
  </code></pre>
  
  <p>It shows modal well in 1-2 seconds but after that, the modal load page again. So, the content of modal is replaced by the page it loaded. Why?</p>
  
  <pre><code>&lt;div id="report" class="modal fade" role="dialog"&gt;
    &lt;div class="modal-dialog"&gt;
      &lt;div class="modal-content"&gt;
        &lt;div class="modal-header"&gt;
          &lt;button type="button" class="close" data-dismiss="modal"&gt;&amp;times;&lt;/button&gt;
          &lt;h4 class="modal-title"&gt;Modal Header&lt;/h4&gt;
        &lt;/div&gt;
        &lt;div class="modal-body"&gt;
          &lt;p&gt;Some text in the modal.&lt;/p&gt;
        &lt;/div&gt;
        &lt;div class="modal-footer"&gt;
          &lt;button type="button" class="btn btn-default" data-dismiss="modal"&gt;Close&lt;/button&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>