Lecture - The Document Object Model

The Document Object Model




Lecture - Getting Started in HTML  and Lecture - Getting Started with CSS




Students in COP4813 and doing web programming should have an understanding of the structure of web pages and how to access elements in a web page. This requires an understanding of the Document Object Model (DOM) and this provides the basis for interactivity with web pages. The DOM is the structure of all web pages and defines how everything on the page is accessed.


Topics covered:

1. Document Object Model for HTML pages

2. Using Javascript to show and change the structure of a web page








Reference Materials

<!DOCTYPE html>
    <title>Hello HTML</title>
    <link rel="stylesheet" type="text/css" href="/styles.css">
  function reducePicture()
   var height = document.getElementById("picture").height;
   var width = document.getElementById("picture").width;
   document.getElementById("picture").height = height / 2;
   document.getElementById("picture").width = width / 2;
    <p class="mystyle">Hello World!</p>
    <a href="https://cop4813eaglin.pbworks.com/w/page/57579829/Lecture%20-%20Getting%20Started
%20in%20HTML">Link to Web Site</a><br/>
    <button onclick="reducePicture()">Reduce Size</button><br/>
    <img id="picture" src="Eaglin.jpg"><br/>



Additional Information


Full information about the DOM is available at the W3C - http://www.w3.org/DOM/ 

You can learn more about the DOM at W3Schools and do tutorials - http://www.w3schools.com/dom/default.asp 

Everything you ever wanted to know about the DOM is at https://developer.mozilla.org/en-US/docs/DOM 


COP 4813 Lectures