CHANGE ANIMATION RANDOMLY WHEN CLICKED?

can anyone tell me if i can (by the push of a button) make the animation change between 2 animations from the original.
if i need script then the two animations (preloaded to character) are 'yes' and 'no'
plz include them in the script (if script is needed) if not brill

if i need script then the two animations (preloaded to character) are 'yes' and 'no'
plz include them in the script (if script is needed) if not brill
