title: dbclick does not work in Raphael.js
body: <p>I have the following JS code fragment (using Raphael lib) and this double click does not work - does anybody can help me sort out why?</p>
  
  <pre><code>var paper = new Raphael(document.getElementById('canvas_container'), 600, 500);
  var shape=[];
  var shapefill=[];
  shape[1] = paper.path('m150,150 l40,0 l0,20 l-40,0 l0,-20z');
  shapefill[1]=toothsurface[1].attr({fill:'#FF33FF'})
  shapefill[1].dbclick(function ()
  {
     window.location="http://127.0.0.1:8000/dbclick/";
  });
  </code></pre>
  
  <p>note: this works perfectly well with a "shapefill[1].click(...);"</p>