I need a help

[burla]

I got a script/way-point, but I wanna make it better, I know global's n variables, but how I change the health potion for mana potion, n wich id I use, in order to buy n position[Like potions, food or this food]?

This is the script:

[url=http://codepad.org/fvo1jSoE][/url]

it's on safe plain text n not able to run!!!

Please someone try to understund my quest, explain how to do or make it, n forgive my bad english...