title: Div collision after floating
body: <p>I have some divs and I want to do them the following way
  parent div (topDiv) holds three divs
  they float (Left, left, right). topDiv does not float.</p>
  
  <p>After this topDiv I have bottomDiv. This div does not float either.
  The problem is that topDiv and bottomDiv collides into each.</p>
  
  <p>I want to do like this:</p>
  
  <pre><code>DIV1 DIV2 DIV3&lt;br&gt;
  DIV1 &lt;br&gt;
  DIV4
  </code></pre>
  
  <p>But I get</p>
  
  <pre><code>DIV1 DIV2 DIV3 **DIV4**
  &lt;br&gt;DIV1
  </code></pre>
  
  <p>Here is code:</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
      &lt;title&gt;Insert title here&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
      &lt;div id="topDiv" &gt;
          &lt;div id = "t1" style="float:left;"&gt; 
              DIV1 &lt;br&gt; DIV1 next line
          &lt;/div&gt;
          &lt;div id = "t2" style="float:left;"&gt; DIV2 &lt;/div&gt;
          &lt;div id = "t3" style="float:left;"&gt; DIV3 &lt;/div&gt;
      &lt;/div&gt;
      &lt;div id = "bottomDiv" style=" background-color:red;"&gt; 
          DIV4 
      &lt;/div&gt;
  
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Thanks in advance.</p>