How to destroy a Modal window completely without a page refresh?

[Venugopal Madathil]

I've made use of modal window for a wizard implementation which has around 
4,5 steps. I need to destroy it completely after the last step(onFinish) 
and OnCancel step without having a page refresh. I can of course hide it, 
but hiding modal windows restores everything as such when i open up it 
again. Could anyone help me on this issue?