8.2 JavaScript – Writing Text and HTML to The Document

One of the most powerful things you can do with JavaScript is to write text to the document. This means that the document does not have to...

8.1 Restricting Text Box Input

When your web page includes a form in which users enter data, it is often a good idea to ensure that the data entered into each field is co...

7.6 JavaScript if Statement and Event Handlers

An if statement executes a part of code, one time, only if a condition is true. You can also include a block of statements to be executed...

7.5 Javascript For Loops, While and Do…While

A “for loop” is quite useful to execute a block of statements a specified number of times. Its syntax is: for (initialize; test; inc...

7.4 JavaScript Expressions and Operators

Functions that return value are expressions. Many expressions use operators. The JavaScript language provides a rich set of operators to p...

7.3 JavaScript

The first thing you should know about JavaScript is that it is a case-sensitive language. Thus, the terms PART, Part and part will be cons...

7.2 The Document Object Model

When a browser loads a Web page, it reads the HTML and holds the document information in memory (as well as displaying it on-screen). The ...