title: pushing up with negative margin and stay visible
body: <p>I have 2 divs in an outer div. The outer div has a top margin so there is a space above it. I want to move the left inner div a little up to fill some of that space. I did a minus margin-top.. it works, it pushes the left inner div up.. but it hides the top 10px that moved up. I want them to stay visible. </p>
  
  <p>I tried making the div have z-index to the front (1) but it does not work. I want to move the inner left div up and want the pushed up part to stay visible.</p>
  
  <pre><code>&lt;div id="line"&gt; //style margin-top:30px
  
    &lt;div id="lineleft"&gt; //style margin-top:-10 z-index=1
    &lt;/div&gt;
  
    &lt;div id="lineright"&gt;
    &lt;/div&gt;
  
  &lt;/div&gt;
  </code></pre>