title: how can assign left of div to left of screen when margin set to auto?
body: <p>for example i created a div like this</p>
  
  <pre><code>&lt;div class="baseDiv" &gt;&lt;/div&gt;
  </code></pre>
  
  <p>and css code is : </p>
  
  <pre><code>.baseDiv {
      margin:0 auto 0 auto;
      display:block;  
      margin-top:-10px;
      width: 100%;
      height:150px;
      background-color:#039;
  }
  </code></pre>
  
  <p>I set div to center of page and left of div fit to left of screen but there is a gap (about 20px) every time, how can remove gap between left of div and left of screen?</p>
  
  <p>Thanks</p>