Hmm- Ambushing script

I have a script that automaticly attacks a specified critter until its dead, is it possible to create one that ambushs. I've been trying to work one out but for some reason it always hangs up at some point. Anyone have any suggestions?

[Hulkein]

How is it hanging up? If you can download like a small guild script (like sweeping or tackling dummies) then you can usually just switch the end results like 'you parry' or whatever it is. Basically just follow the commands in a pre-existing script and edit it for you. Or just IM Kranar.