title: What's the difference between "left top" and "top left" in jquery ui position
body: <p>What's the difference between the following two postion setting?</p>
  
  <p>Setting 1：(easy to understand)</p>
  
  <pre><code>$("#myinput").autocomplete({
      source: myArray,
      position: { my: "**left top**", at: "right top" }
  });
  </code></pre>
  
  <p>Setting 2: (confusing)</p>
  
  <pre><code>$("#myinput").autocomplete({
      source: myArray,
      position: { my: "**top left**", at: "right top" }
  });
  </code></pre>