attack cooldown?

How can i make it so i can adjust the hero's attack cooldown by the second?

what do you mean? do you want something that makes the hero attack slower and slower every second? if so i don't think it's possible with triggers... you might be able to pull it off adding a buff like frost to the unit

i want to be able to change the attack cooldown up or down.

like player carries said weapon, then it would change the cooldown to what ever that weapon's speed is, for example 2.5 secs

There's an item ability that increases/decreases cooldown by a percentage, u can set the attack speed to be 1.00, and then its all simple..

so i set it to 1 sec? then when i increase it by, 0.50 its 1.5 secs?

cool downs cannot be decreased by a constant, unless you do some really boring arrays holding all the cooldoons, cooldown is decreased by a % of the base cooldown from IAS

maybe you can do what i suggested and have a dummy cast a buff on the unit weilding the weapon and have him attack faster/slower like blood lust or frost. just a suggestion i'll play with it more later.

No, use what Shadow said. If its all based off of 1.0 seconds its super easy to calculate how much you need to increase by for each .1 seconds or whatever.

I would like blizzard adding functions for smooth attack speed change.