"Bouncing" attacks. Plz Help Me!

I've probably asked this question between 5 and 10 times in the past year, and recieved not a single answer from anybody! I want to make a hero ability that makes his attacks bounce from target to target (like the huntress). How can I change his attack type (VIA TRIGGERS PLZ) to "missile - bounce" from an ordinary missle??? If it requires JASS, then I'll go hunting somebody who knows JASS. But if anybody has even the slightest idea, I would REALLY APPRECIATE the help!!!

I think there is a spezial ability, if this is true you can give your Unit this ability per trigger,

Obviously, there is moon glaive, but the hero has to have the "missle - bounce" type of attack BEFORE this is used, or it will be irrellivant. That was how I was planning on levelling up the spell.

You could just make Attack 1 your normal attack and Attack 2 your bounce attack. When you research/learn the upgrade/ability have it switch the unit's attack from Attack 1 to Attack 2.

OMG!!! Ingenious! Thx very, very much! ^_^

I think Heroes already use their second attack when they pick up orbs that allow them to target air. Alternatively, you could give the hero the bounce attack from the beginning, but have it bounce 0 times at first. That way, it will act as a normal missle attack untill you research the "number of bounces" bonus.