 2004 Prentice Hall, Inc. All rights reserved. Chapter 14 - Dynamic HTML: Event Model Outline 14.1 Introduction 14.2 Event onclick 14.3 Event onload 14.4.

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Presentation transcript:

 2004 Prentice Hall, Inc. All rights reserved. Chapter 14 - Dynamic HTML: Event Model Outline 14.1 Introduction 14.2 Event onclick 14.3 Event onload 14.4 Error Handling with onerror 14.5 Tracking the Mouse with Event onmousemove 14.6 Rollovers with onmouseover and onmouseout 14.7 Form Processing with onfocus and onblur 14.8 More Form Processing with onsubmit and onreset 14.9 Event Bubbling More DHTML Events 14.11Web Resources

 2004 Prentice Hall, Inc. All rights reserved. Objectives In this lesson, you will learn: –To understand the notion of events, event handlers and event bubbling. –To be able to create event handlers that respond to mouse and keyboard events. –To be able to use the event object to be made aware of and, ultimately, respond to user actions. –To understand how to recognize and respond to the most popular events.

 2004 Prentice Hall, Inc. All rights reserved Introduction Event model –Scripts can respond to user –Content becomes more dynamic –Interfaces become more intuitive

 2004 Prentice Hall, Inc. All rights reserved Event onclick onClick –Invoked when user clicks the mouse on a specific item

 2004 Prentice Hall, Inc. All rights reserved. Outline onclick.html (1 of 2)

 2004 Prentice Hall, Inc. All rights reserved. Outline onclick.html (2 of 2)

 2004 Prentice Hall, Inc. All rights reserved.

14.3 Event onload onload event –Fires when an element finishes loading –Used in the body element –Initiates a script after the page loads into the client

 2004 Prentice Hall, Inc. All rights reserved. Outline onload.html (1 of 2)

 2004 Prentice Hall, Inc. All rights reserved. Outline onload.html (2 of 2)

 2004 Prentice Hall, Inc. All rights reserved Error Handling with onerror onerror event –Execute specialized error-handling code

 2004 Prentice Hall, Inc. All rights reserved. Outline onerror.html (1 of 2)

 2004 Prentice Hall, Inc. All rights reserved. Outline onerror.html (2 of 2)

 2004 Prentice Hall, Inc. All rights reserved Tracking the Mouse with Event onmousemove onmousemove –Fires repeatedly when the user moves the mouse over the Web page –Gives position of the mouse

 2004 Prentice Hall, Inc. All rights reserved. Outline onmousemove.html (1 of 2)

 2004 Prentice Hall, Inc. All rights reserved. Outline onmousemove.html (2 of 2)

 2004 Prentice Hall, Inc. All rights reserved Rollovers with onmouseover and onmouseout Two more events fired by mouse movements –onmouseover Mouse cursor moves over element –Onmouseout Mouse cursor leaves element

 2004 Prentice Hall, Inc. All rights reserved Rollovers with onmouseover and onmouseout

 2004 Prentice Hall, Inc. All rights reserved. Outline onmouseoverout.html (1 of 4)

 2004 Prentice Hall, Inc. All rights reserved. Outline onmouseoverout.html (2 of 4)

 2004 Prentice Hall, Inc. All rights reserved. Outline onmouseoverout.html (3 of 4)

 2004 Prentice Hall, Inc. All rights reserved. Outline onmouseoverout.html (4 of 4)

 2004 Prentice Hall, Inc. All rights reserved.

14.7 Form Processing with onfocus and onblur onfocus event fires when element gains focus onblur event fires when element loses focus

 2004 Prentice Hall, Inc. All rights reserved. Outline onfocusblur.html (1 of 3)

 2004 Prentice Hall, Inc. All rights reserved. Outline onfocusblur.html (2 of 3)

 2004 Prentice Hall, Inc. All rights reserved. Outline onfocusblur.html (3 of 3)

 2004 Prentice Hall, Inc. All rights reserved More Form Processing with onsubmit and onreset onsubmit and onreset are useful events for processing forms

 2004 Prentice Hall, Inc. All rights reserved. Outline onsubmitreset.html (1 of 4)

 2004 Prentice Hall, Inc. All rights reserved. Outline onsubmitreset.html (2 of 4)

 2004 Prentice Hall, Inc. All rights reserved. Outline onsubmitreset.html (3 of 4)

 2004 Prentice Hall, Inc. All rights reserved. Outline onsubmitreset.html (4 of 4)

 2004 Prentice Hall, Inc. All rights reserved Event Bubbling Crucial part of the event model Process whereby events fired in child elements “bubble” up to their parent elements

 2004 Prentice Hall, Inc. All rights reserved. Outline bubbling.html (1 of 2)

 2004 Prentice Hall, Inc. All rights reserved. Outline bubbling.html (2 of 2)

 2004 Prentice Hall, Inc. All rights reserved.

14.10 More DHTML Events Remaining DHTML events and their descriptions

 2004 Prentice Hall, Inc. All rights reserved More DHTML Events

 2004 Prentice Hall, Inc. All rights reserved More DHTML Events

 2004 Prentice Hall, Inc. All rights reserved More DHTML Events