well hello

what does a delightful gentleman of sub-Saharan descent need to do to get some eel d

I don't know why I expected anything else

Pretty sure it's the ratio of testosterone to estrogen present while in the womb, with higher testosterone meaning longer ring finger. It's not that unusual for men to have a longer index finger than ring finger.

"haha yes"
...
"haha yes"

Hey that's my mum

It's shown in dev tools which displays code after parsing and execution. Yeah fair point about vars

Bloody oath, that's basically my job too

That code wasn't written by hand, it would be generated by JavaScript. This code is all you need to generate the options, although adding type="number" to a text field is still a much better idea:
var options="";
for(var i=0;i<10000;i++){
var val=("0000" + i).slice(-4);
options+="<option value="+val+">val</option>";}
select.innerHTML=options;