What substitute should we use for layerX/layerY since they are deprecated in webkit?
<p>In chrome canary, layerX and layerY are deprecated, but what should we use instead ?</p>

<p>I've find offsetX but it doesn't work with Firefox. So to get layerX without warning on webkit, I've done that :</p>

<pre><code>var x = evt.offsetX || evt.layerX,
    y = evt.offsetY || evt.layerY;
</code></pre>

<p>But this seem quite complex ! Is that really what we should do to get layerX working in all browsers ?</p>
