Category Archives: Tutorial






CSS Introduction

What is css? CSS stands for Cascading Style Sheets Styles define how to display HTML elements Styles were added to HTML 4.0 to solve a problem External Style Sheets can save a lot of work External Style Sheets are stored in CSS files Styles Solved a Big Problem: HTML was never intended to contain tags for formatting a document. HTML was intended to define

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Javascript Object and Events

6.0. Objective 6.1. Introduction 6.2 Objects and methods    6.2.1. The Document Object   6.2.2. Image Object 6.3. Event Handling 6.3.1. HTML Events 6.3.2 event object 6.5. Summary

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6.5. Summary

Objects are a natural way of thinking about the world. JavaScript defines various objects like the document object, window object, image object, the event object, etc. There are properties, methods and events associated with each object. The events and  properties of objects can be manipulated using methods which are called event  handlers, like onClick, OnMouseover

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6.3.2. event object

During normal program execution, a large number of events occur, so the event object is a fairly active object, constantly changing its properties.  Whenever an event fires, the computer places appropriate data about the event into the event object – for example, where the mouse pointer was on the screen at the time of the

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6.3.1. HTML Events

Not all events are significant to a program.  We can simplify situations to determine which events are significant, and  which events we can leave out.  As we know, HTML provides elements to allow us to create web documents.  We can fill these elements with our own data and display unique web documents.  We can position

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6.3. Event Handling

An event is an activity that happens on the web document.  More frequently, multiple inputs are received from the user at once through html form.  The user creates events while interacting  with the DHTML form elements.  Dynamic HTML with the event model exists so that scripts can respond to user interactions and change the page

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6.2.2. Image Object

Java Script provides image object which allows the developers to dynamically change the object as well as its width and height. An image can be incorporated into an HTML document  using the following tag: <IMG SRC = “ImageURL” [LOWSRC = “LowResImgURL”] [NAME = “ImageName”] [WIDTH = “Pixels” I “PercentValue”] [HEIGHT =”Pixels” I “PercentValue”] [HSPACE =

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6.2.1. The document Object

JavaScript provides the document object for manipulating the document that is currently visible in the browser window. The document object can be created using the following HTML tag: <BODY [BACKGROUND = “backgroundImage] [BGCOLOR = “backgroundColor”] [FGCOLOR = “foregroundcolor”] Text [LINk = “linkColor”] [ALINK= “activeLinkColor”] [VLINK = “visited LinkColor”] </BODY> The document object has many useful

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6.2 Objects and methods

Objects are a natural way of thinking about the world and of writing scripts that manipulate XHTML documents.  Java Script uses objects to perform many tasks and therefore referred to as and ovject-based programming language. It facilitates objects to be defined ad used in the documents.  All objects in the real world have attributes such

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Object and Events Introduction

Most of the JavaScript programs provided to this point illustrate basic computer programming concepts.  These provide you with the foundation you need to build powerful and complex scripts as part of your Webpages.  This chapter presents a more formal treatment to JavaScript Objects that enables scripts to interact with the elements of an XHTML document. 

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