Putting Javascript Tool in WordPress Post

Hoping I can get some help – I don’t know much (or anything) about code, but I am trying to create a name generator tool for my website.

I found a free piece of code that allowed me to download a name generator javascript code and then cut and pasted names I wanted to generate. I saved the code as a name-generator.js and uploaded it to the root domain of my website.

I read in the Using Javascript codex that when you want to use javascript on one specific page/post, you put this in:

<script type="text/javascript" src="/scripts/updatepage.js"></script>
<script type="text/javascript">
<!--
updatepage();
//--></script>

I did this in my post, replacing “updatepage.js” with “name-generator.js” but nothing shows up.

I also do not understand when the codex says

Make sure that each script is defined by its function name, such as:

function updatepage(){var m="Page updated "+document.lastMo.......}

The function used in my javascript is:
function generator()
so I replaced the “updatepage()” with “generator()” but I do not know if that makes sense.

Thank you so much, I’m sorry, really no idea what I am doing!