Control speed of actions after they're created?

cocos2d-x JavaScript
#1

Is there any way to control the actions of an sprite after they have been created ?

I have a sprite that moves on a predefined path, and after it’s hit by an shot I want to create a slow for x seconds effect.

Is there any way to slow down the existing actions for x seconds ?

I tried using cc.Speed but it’s not clear how it should work.

#2

Maybe you could try with these methods getAllActions or getAction (action) and slow it down or remove this action and create slower new.
http://www.cocos2d-x.org/embedded/cocos2d-x/d0/ded/classcocos2d_1_1_c_c_node.html#a9e9c316a6f3273a0d1229be878145904