title: Raphael.js how to set attribute for a path?
body: <p>In Raphael.js, If I have a path object, I would like to reset the attribute, how to do it?</p>
  
  <pre><code>myPath.attr('M', VALUE_FOR_M)
        .attr('L', VALUE_FOR_L);
  </code></pre>
  
  <p>seems not working...</p>