11-28 Web Base--javascript (DOM)

Web Foundation Part II--htmldom operation

Definition: Htmldom is a model of an object-oriented tree that contains all the elements in the HTML, and all elements contained in the DOM can be found through HTML.

Second, the role:

1. Find HTML elements

1) Find elements by ID (document.getElementById ();)

<div id= "D" ></div>

var X=document.getelementbyid ("D");

2) Find elements by tag name

<div id= "M" ></div>

var X=document.getelementbyid ("M");

var y=x.getelementbytagname ("div");

3) Find elements by class name

Third, change the HTML

1) Change HTML content

2) changing HTML properties

3) Change HTML style

Iv. Htmldom Events

1) Reacting to events

2) HTML Event Properties

3) Use Htmldom to assign events

11-28 Web Base--javascript (DOM)