title: Make div with bottom triangle
body: <p>I have been trying to do the <strong>white shape</strong> with a div:</p>
  
  <p><a href="http://sircat.net/joomla/sircat/mies/2.png" rel="nofollow noreferrer">http://sircat.net/joomla/sircat/mies/2.png</a></p>
  
  <p>how do I get the diagonal shapes of the bottom of the div?</p>
  
  <p>I have this for the div:
      width: 620px;
      height: 440px;
      background-color: white;</p>
  
  <p>thank you</p>
  
  <p>Edit: just forget the bg behind the div, I want to make the div with the diagonal borders, not with the help of the bg because it is in the top layer</p>