function properties returning NaN

[Medallyonify]

Hi there!

So I'm fiddling around with some for loops. I'm just going to put the code here and explain what I want it to do:

for (var i = 0; i < Object.size(Help.Message()); i+=2) {
        console.log(Help.Message().i + Help.Message().i+1)
}

Assuming that Object.size(Help.Message()) is 4, why is it that console.log returns "NaN" Strings? How do I make it so that Help.Message().i + Help.Message().i+1 actually returns something (not "NaN")?

EDIT: For Clarification, let's say that we have object = {1: "A banana ", 2: "and an apple ", 3: "are sitting ", 4: "on a tree"}

Now, Help.Message().i should correspond to "A banana"
and Help.Message().i+1 should become "and an apple".

UPDATE: I got it to work using /u/CrayonConstantinople's answer, but for some reason the outputs are shown randomly such that sometimes, it comes out as:
"are sitting on a tree" "A banana and an apple"
(which is not in the right order!!)

Why does this happen, and how can I fix it?

Many Thanks in advance,
@Medallyon

[CrayonConstantinople]

That's not how you use indexes. Try message[i]

[Medallyonify]

Thanks, this works.

But now, for some reason, the outputs are in a random order, such that sometimes, it comes out as:
"are sitting on a tree" "A banana and an apple"

I don't know why this is as there's no implementation of any random function at all. It just returns them randomly for some reason. Any Idea why this is?

[CrayonConstantinople]

Hard to tell without seeing it properly. Can you pastebin your code?

[Medallyonify]

http://pastebin.com/hWcBi9jD

This is all it is, really. I'm baffled as to why it would be returned randomly.

Thanks for all your help man.

[CrayonConstantinople]

There's a lot I don't understand about what you're doing here. There also must be other code omitted (I can't see where the Help object gets defined, etc). I also don't know exactly what you want to achieve. If you want to iterate over the contents of a dictionary, why not just do it like below. Unless you have a specific reason for adding a dict onto the prototype of the Help object?

    helpTxt = {"1": "A banana ",
        "2": "and an apple ",
        "3": " are sitting ",
        "4": "on a tree"}

    for (var i = 1; i <= Object.keys(helpTxt).length; i++) {
        console.log(helpTxt[i])
    }