Dynamic animation in IE9 : how to stop them

I encounter the same problem that question https://answers.launchpad.net/smil/+question/203333 solved using dynamically created animation in SVG.

After using the given script function "registerAnimation", the animation are working in IE (I'm using IE 11).

My problem is that I have to be able to start/stop animation dynamically. On Chrome and Firefox, I simply remove the animate Tag from the DOM and it works, but in IE it doesn't work. I suppose that it is related to the use of the "registerAnimation" function.

Is there a way that I can use to "unregister" a previously registered animation ?

see JsFiddle here: http://jsfiddle.net/jLhsb/25/
Comment regarding the JsFiddle: clicking on the red box will stop/start the animation of the first black box (works on Chrome, not on IE11)