Spot the errors

test-one.txt

/* 
JavaScript Test
---------------

A small script to open a popup when clicking a link.
Once you click on the button, clinking on it again will close the popup.

*/

/* Task One - Improve this code

var close = 'Close List';
var open = 'Open List';
var isOpen = false;
var FirstButton = document.getElementById('#1st-button");
var HTMLElement = document.getElementById('#Pop-Up');

var load = fucntion() {
  FirstButton.innerText = open;

  FirstButton.addEventListener('onClick', function(Event) {
    isOpen = isOpen ? false : true;
    open(HTMLElement, isOpen);
    if(isOpen) 
      FirstButton.css('background-color', rgba(234,54,43);
    else
      FirstButton.innerText = isOpen ? open : close;
    return isOpen = true;
  }
}

var open = function(element, close) {
  element.css('display', close : 'none' ? 'block');
}

window.addEventListener(onLoad, function onLoad() {load()});

open(FirstButton, isOpen);

There are good few errors and improvements to be made in this code. Can you spot them all?