Solved Use document.forms[0] to return the first 'form' | Chegg.com
Select a DOM Element with document.getElementById | egghead.io
JS Dom | PDF
What is the DOM? A Behind-the-Scenes Guide
c# - getElementById on element within an iframe - Stack Overflow
Manipulating documents - Learn web development | MDN
javascript - document.body.append(document.createElement('p').innerHTML="this is p") behaving differently if I give them in separate statements? - Stack Overflow
Select an HTML Element with document.querySelector | egghead.io
javascript - document.getElementById fails on <div> in asp.net - Stack Overflow
Document Object Model (DOM) Tutorial Series: Part 1 - Alibaba Cloud Community
javascript - Can I get element inside #document? - Stack Overflow
Document Object Model. In this article, we will learn how HTML… | by Vinayak Tekade | Coder's Capsule | Medium
Document Object Model - Wikipedia
HTML DOM getElementById() Method - GeeksforGeeks
The Document Object Model :: Eloquent JavaScript
HTML and CSS Tutorial: The Basics
Using getElementById in Javascript
Dom Concept
The Document-Object Model -- Eloquent JavaScript
Get Element By ID in JavaScript - JavaScript #shorts 97 - YouTube