title: why mouse event 's position have wrong in kineticjs?
body: <p>i have a kineticjs, i use  tag to get kineticjs canvas's position is center </p>
  
  <pre><code>#mycanvas{text-align:center;}
  </code></pre>
  
  <p>And when run it, event area far from object 200px , at left side of object.
  I can't understand the reason?
  Thank for all answer!</p>