Dynamic HTML is not a new markup language. It is a collection of technologies (generally HTML, CSS and JavaScript) which changes the document content once it is loaded into a web browser. Some examples for dynamism in a web document are given below: Changes to document content on user interactions or after a specified […]
One of the best uses of client-side JavaScript is the form validation. The input given by the user can be validated either on the client-side or on the server-side. By performing validation on the client-side using JavaScript, the advantages are less load on the server, saving network bandwidth and quicker response for the users. […]
Creation and Manipulation of User Defined Objects An object is a real world entity that contains properties and behaviour. Properties are implemented as identifiers and behaviour is implemented using a set of methods. An object in JavaScript doesn’t contain any predefined type. In JavaScript the new operator is used to create a blank […]
Input and Output in JavaScript JavaScript models the HTML/XHTML document as the document object and the browser window which displays the HTML/XHTML document as the window object. The document object contains a method named write to output text and data on to the document as shown below: document.write(“Welcome to JavaScript”); To display multiple […]
Introduction The mechanism of converting a value or variable from one type to another type is known as type conversion. There two types of type conversion: implicit type conversion and explicit type conversion. Implicit Type Conversion Type conversion which is performed automatically by the JavaScript interpreter is known as implicit type conversion […]
Introduction DHTML (Dynamic HTML) is not a new language. It is a combination of existing technologies like HTML, CSS, Javascript and DOM. Document Object Model (DOM) is a platform independent and language independent mechanism or API which allows the developer to implement dynamism into the web pages. DOM represents the web page as […]
In this article we will learn about built in objects in JavaScript like Array, Date, Math, String and Number and the methods in them. Introduction To solve different kinds of problems, JavaScript provides various built-in objects. Each object contains properties and methods. Some of the built-in objects in Javascript are: Array Date Math […]
The programming which allows computations based on the activities in a browser or by the activities performed by the user on the elements in a document is known as event-driven programming. Let’s learn about event handling in JavaScript. An event is the specification (essentially an object created by the browser and JavaScript) of something […]
In this article we will learn about functions in JavaScript. We will learn how to declare a function and how to use it with examples. Introduction A function is a block of code which can be executed again and again. Functions make the code modular which improves maintenance. Functions in JavaScript are similar […]
In this article we will learn about arrays in JavaScript. We will look at how to create arrays and use them with the help of examples. Introduction An array is a collection of elements. Unlike in Java, arrays in JavaScript can contain elements of different types. A data element can be a primitive […]