title: absolute positioning image in a div causing all content behind it to overlap
body: <p>I am using twitter bootstrap, and I have the following code:</p>
  
  <pre><code>&lt;div class="row clearfix"&gt;
      &lt;div class="col-md-12 column"&gt;
          &lt;img src="img/map.jpg" id="map" /&gt;
          &lt;a id="modal-786791" href="#modal-container-786791" role="button" class="btn" data-toggle="modal"&gt;&lt;img src="img/pin.png"/&gt;&lt;/a&gt; 
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>CSS:</p>
  
  <pre><code>#map{
      position: absolute;
  }
  
  #modal-786791 img{
      position:relative;
  }
  </code></pre>
  
  <p>I need to put the pin on top of the map. So I positioned the map absolutely and the pin relatively.
  The problem is that when I put <code>#map</code> in an absolute positioning, all the content that follows the parent div is overlapping it. Here is a screenshot to show you the result:</p>
  
  <p><img src="https://i.stack.imgur.com/cfnAV.jpg" alt="enter image description here"></p>
  
  <p>What is it that I am doing wrong?</p>
  
  <p>Thanks</p>