MoopleDEV, scripting NPC!

[JJCee]

So I am very very new to this and I am trying to learn a little bit of javascript and I got help writing a script for a gachapon but I am running into some problems, when it should reward me an item it gives me the error "An unknown error occurred while executing this NPC"

I came across this and I kinda tried the advice but I probably should have read all the posts first, it's to fix cm.haveItem, I have no idea if I am just bad at this but I have problems getting cm.haveItem work, so I guess that could be the problem? I should be running on REV 120, yes it's a different REV in that thread as well, don't judge me... :*:
http://forum.ragezone.com/f427/mini-add-fixing-moopledev-rev-743167/

Here is the script I am trying to get working, the problem starts after "Would you like to use a coupon" that's where I get the error and I am stuck, and kindly asks for your assistance.
I removed the item ID's cause there were a lot of them and not relevant right now.

var status = 0;
var Tier1 = Array(3010378, 3010379, 3010380, 3010381, 3010382);
var Tier2 = Array(3010378, 3010379, 3010380, 3010381, 3010382);
var Tier3 = Array(3010378, 3010379, 3010380, 3010381, 3010382);
var Tier4 = Array(3010378, 3010379, 3010380, 3010381, 3010382); 


function start() {
    status = -1;
    action(1, 0, 0);
}


function action(mode, type, selection) {
   if (mode == -1) {
       cm.dispose();
   } else {
      if (status == 0 && mode == 0) {
         cm.sendOk("Okay, see you next time");
         cm.dispose();
         return;
      }
      if (mode == 1)
         status++;
      else  
         status--;
      if (status == 0) {
         cm.sendYesNo("Would you like to use a Coupon?");
      } else if (status == 1) {
         if (cm.haveItem(5220000, 1)) {
            var rand = math.floor(math.random() * 100) + 1;
            cm.gainItem(5220000, -1);
            if (rand >= 0 && rand <= 40) { //Do the ">=" cause problems? if it should use ">" only instead
               cm.gainItem(Tier1[math.floor(math.random() * Tier1.length())], 1);
            } else if (rand >= 41 && rand <= 70) {
               cm.gainItem(Tier2[math.floor(math.random() * Tier2.length())], 1);
            } else if (rand >= 71 && rand <= 80) {
               cm.gainItem(Tier3[math.floor(math.random() * Tier3.length())], 1);
            } else if (rand >= 81 && rand <= 100) {
               cm.gainItem(Tier4[math.floor(math.random() * Tier4.length())], 1);
            }
            cm.dispose();
         } else {
            cm.sendOk("You don't have a coupon");
            cm.dispose(); 
         }
      }   
   }
}

These php tags are really frustrating, I have no idea how to make it readable...
If it helps here is an image of the code and if you would like to download it:
https://i.imgur.com/HW7kuOH.png

https://mega.nz/#!jVhRhAbJ!Kh1sU4AJZTd2tfLZDNYdrJZtXCd5TBiA5IN-AkMSD2o

 

[jamaykids]

cm.haveItem ...

var Tier1 = Array(itemid,itemid,itemid);
var Tier2 = Array(itemid,itemid,itemid);
var Tier3 = Array(itemid,itemid,itemid);
var Tier4 = Array(itemid,itemid,itemid);

 

[JJCee]

cm.haveItem ...

var Tier1 = Array(itemid,itemid,itemid);
var Tier2 = Array(itemid,itemid,itemid);
var Tier3 = Array(itemid,itemid,itemid);
var Tier4 = Array(itemid,itemid,itemid);

Yes I am aware that there are no item ID's in the arrays like I said I did remove them?
I don't know what you are tying to say with "cm.haveItem..." either.

 

[jamaykids]

Yes I am aware that there are no item ID's in the arrays like I said I did remove them?
I don't know what you are tying to say with "cm.haveItem..." either.

>>> if (haveItem(5220000, 1)) { <<<

 

[captchafan]

if (cm.haveItem(5220000, 1)) {

Always remember to add "cm." in front of the function you're trying to call from NPCConversationManager

Also, try using [ CODE ] tag instead of [ PHP ]

By the way, rand > 0 && rand <= 40 and rand > 41 && rand <= 70? What about 41?
Same thing with 71 and 81

 

[JJCee]

>>> if (haveItem(5220000, 1)) { <<<

Ohh okey, was quite confusing at first, thank you!

if (cm.haveItem(5220000, 1)) {

Always remember to add "cm." in front of the function you're trying to call from NPCConversationManager

Also, try using [ CODE ] tag instead of [ PHP ]

By the way, rand > 0 && rand <= 40 and rand > 41 && rand <= 70? What about 41?
Same thing with 71 and 81

Thank you very much for the help, everything you mentioned worked for the better, I appreciate the help!

There is still a problem with the script it still refuses to give me an item, I added a few random chairs in the script.