title: Auto adjust divs height to fill up the remaining space
body: <p>I have 2 <code>div</code>s. I gave the first one a <code>height</code> of <code>70px</code> and now I want the 2<sup>nd</sup> <code>div</code> to fill up the remaining space of the webpage. This should be relative to the first div. Below is my code: (The 2 <code>div</code>s are <code>header</code> and <code>content</code>)</p>
  
  <pre><code>* {
    margin: 0px;
    padding: 0px;
  }
  
  #header {
    background-color: #1874CD;
    width: 100%;
    height: 70px;
  }
  
  #name {
    color: #ffffff;
    padding: 10px 10px 10px 10px;
    font-size: 35px;
    font-weight: bold;
    font-family: Calibri;
  }
  
  #content {
    background-color: #F5F5F5;
    width: 100%;
    height: 650px;
  }
  </code></pre>