title: Detecting wether a point is inside or outside of a raphael.js shape
body: <p>I have a raphael.js shape which I am plotting circle's on top of. I only want a circle to appear if the circle does not go off the boundary of the shape it is being plotted on to.</p>
  
  <p>To make this more clear, here is an example of what I do not want to happen:</p>
  
  <p><a href="http://img682.imageshack.us/img682/4168/shapeh.png" rel="nofollow noreferrer">Example http://img682.imageshack.us/img682/4168/shapeh.png</a></p>
  
  <p>I want the circles outside of the grey area not to appear. How would I detect wether a circle is inside or outside of the grey shape?</p>