JavaScript

Encapsulation is the process of adding header information to the layers' data "payload". As the "payload" is passed from one TCP/IP (or OSI) layer to the next, encapsulating layer information is wrapped around the data. So, for example, if the application layer produces a data payload for transmission, it encapsulates it with application-layers headers, which then gets passed to the presentation layer. The presentation layer does the same and so down the protocol stack before transmission across the physical media. At the destination, the process is reversed by way of de-encapsulation where the headers are stripped-off by each matching layer at the destination.

1. Application, Presentation and Session layers create data. {Encapsulation headers added by layers}

2. Transport layer coverts data into segments for transport across the network. {Encapsulation headers added by layer}

3. Network layer converts segments into packets (or Datagrams). {Encapsulation headers added by layer}

4. Data Link layer converts packets (and datagrams) into Frames and the Data Link header is added. {Encapsulation headers added by layer}

5. Physical - frames are converted into bits for transmission over the physical media.{Encapsulation headers added by layer}

JavaScript was developed to address specific needs and challenges related to web development. Here are the key reasons why JavaScript was created:

Dynamic Web Pages: In the early days of the web, web pages were static and displayed static content. JavaScript was introduced to enable the creation of dynamic web pages that could respond to user interactions, such as mouse clicks and form submissions. This made websites more interactive and user-friendly.

Client-Side Scripting: JavaScript is a client-side scripting language, which means it runs in the user's web browser rather than on the web server. This allows web developers to create responsive and interactive user interfaces without relying solely on server-side processing.

Enhanced User Experience: JavaScript enables developers to create features like image sliders, interactive forms, and real-time updates, enhancing the overall user experience of a website or web application.

Reduced Server Load: By offloading certain tasks to the client-side, JavaScript reduces the load on web servers, making websites more efficient and scalable.

Cross-Browser Compatibility: JavaScript was developed to work across different web browsers, ensuring that web applications function consistently for users regardless of their browser choice.

Open Standards: JavaScript is based on open standards and is supported by web standards organizations like the World Wide Web Consortium (W3C). This means it can be used in a vendor-neutral manner.

Versatility: JavaScript is a versatile language that can be used for a wide range of tasks, from DOM manipulation and form validation to creating web-based games and interactive charts.

Interactivity: JavaScript allows developers to create interactive elements that respond to user actions, such as pop-up windows, tooltips, and drag-and-drop functionality.

Ecosystem and Libraries: Over time, JavaScript has evolved to include a rich ecosystem of libraries and frameworks (e.g., jQuery, React, Angular) that simplify web development and offer pre-built solutions for common tasks.

Evolution of Web Applications: As web applications became more complex and user expectations grew, JavaScript played a crucial role in enabling the development of sophisticated and feature-rich web applications.

JavaScript continues to be a fundamental technology for web development and has expanded its reach beyond the browser into server-side development (e.g., Node.js) and even mobile app development (e.g., React Native). Its versatility and wide adoption make it a cornerstone of modern web development. And Contact Croma Campus for the Best jQuery Online Course because they are one of the best IT Insitite In India.

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text of a play, characters, setting

There are some online HTML editors, but the main ones are Notepad for window and TextEdit for Mac.

Ajax - Asynchronous JavaScript and XML

By using the programming practice termed "Ajax" you will be able to trade data without having to load a new page. AJAX is a new technique for creating better, faster, and more interactive web applications. With it, Internet applications can be made richer and more user-friendly.

Javascript is a scripting language that is object based code that makes it easier to work with objects. Java Applets is an applet that reads Java, which is different than Javascript, and compiles it. Java Applets are mostly known for games and can also be used for a website if you know what you are doing.

JavaScript is a dynamic programming language that conforms to the ECMAScript specification. JavaScript is high-level, often just-in-time compiled, and multi-paradigm. It has curly-bracket syntax, dynamic typing, prototype-based object-orientation, and first-class functions.

A shooting script is a detailed version of a screenplay that includes specific visual and technical instructions for filming. It typically features scene headings, action descriptions, dialogue, and may also include camera angles, shot types, and notes for sound and lighting. The format is often more structured than a standard screenplay, helping the crew understand the director's vision. This type of script serves as a blueprint for the production process, guiding each aspect of filming.

Here is a JavaScript option for determining if a number is odd or even. It even lets you know if the number is zero (if you want zero to be neither odd nor even).

var n = prompt("Enter a number to identify as odd or even", "Type your number here");

n = parseInt(n);

if (isNaN(n))

{ alert("Please Enter a Number"); }

else if (n == 0) { alert("The number is zero"); }

else if (n%2) { alert("The number is odd"); }

else { alert("The number is even"); }

There's an old saying among programmers that Java is to JavaScript as ham is to hamster. The one you choose to learn first is more a preferential choice than one of the easier way to learn.

Java is not related to JavaScript.

Java is an object-oriented, compiled computer language used to build everything from televisions to advanced scientific equipment to operating systems. Java has a very large set of prebuilt functions, and is similar to C#.

JavaScript is also object-oriented, but the kind of object orientation is different than most every other object oriented language. JavaScript allows you to manipulate the elements of an HTML document, as well as do some basic server-side stuff. JavaScript has a much smaller area of concern than Java. JavaScript remains plaintext, and is not compiled. It also has no access outside the browser (if they haven't made a mistake in the browser.)

I would suggest you learn JavaScript if you have an ambition to work with the web. Java also has a footprint on the internet, but it's mostly server-side and much smaller.

If you want to go into Software Engineering, and are looking for a good language to start dealing with the complexities therein, than Java is a good choice. It's robust, widely available, and has a vibrant community.

Learning both wouldn't hurt you either, but it's important to understand that they are not related in any way, except for their names, and an ancient connection to Netscape.

If you mean how to create a login code with HTML, you need a tag called

public class welcome { public static void main (String args[]) {

System.out.println("Welcome to Java programming");

}

}

There are also many "Hello World" tutorials you can find elsewhere on the internet

In general, no you do not need Java or JavaScript to play music on your computer. However, if you want to hear music played by a website, there's a good chance that it uses one of these technologies to do it, in which case you would need Java or a JavaScript enabled browser.

james prinsep

Client is when the images, animation, and other things on the page is not needed to go back to the server and load it all. Server is when the images, animation, and other things on the page need to be taken from the server every time. Its very useful to have Client because that way all the information on your page does not need to be reloaded every time. instead it is stored in history and is retrieved much faster.

The oldest known script is cuneiform, which originated in ancient Mesopotamia around 3200 BCE. Developed by the Sumerians, it involved the use of wedge-shaped marks made on clay tablets. Cuneiform was initially utilized for record-keeping and administrative purposes and eventually evolved to express a wide range of languages and literature. Its invention marked a significant milestone in human communication and the recording of history.

Instructions in a script, often referred to as stage directions or action lines, provide guidance on how actors should perform, how scenes should be set, and what emotions or tones should be conveyed. They can include details about character movements, facial expressions, and interactions, as well as descriptions of the environment and any relevant sound or lighting cues. These instructions help to create a cohesive vision for the production and ensure that all elements work together effectively.

You can call the Script like this,

<script type="text/javascript" src="perl_script.pl"></script>

So you just replace a regular Javascript Call ( .js ) with the .pl Script.

Inside the Perl Script you will have to use embraced Javascript Functions / Code,

f.e. like print "document.write.('Hello World');";.

JavaScript programs cannot be compiled, but it is easy to run them if you embed them into a HTML file, and open it in your browser.

Note: If you want a example, select menu-command View/Source and search for '<script'

to implement javascript embed the statements between <script> n </script>,,,

and include any scripting language.

eg:<script LANGUAGE="javascript">

block of codes

</script>

Scripting languages, of which JavaScript is one, are light-weight programming languages (i.e. not a fully featured programming languages) that exist to enhance HTML and web pages so that they are dynamic or interactive. They interact with, amend or generate HTML. They would not have any function outside of a web page environment.

<html>

<head>

</head>

<script language="VBscript">

sub fact(n)

dim f,i

f=1

i=1

do while(i<=cint(n))

f=cint(f)*cint(i)

i=i+1

loop

document.write("<br>Factorial of"&n&"is"&f)

end sub

</script>

<body>

<form name="form1" method="post" action=" ">

<input name="n" type="text" id="n">

<input name="Button" type="button" onClick="fact(form1.n.value)" value="Factorial">

</form>

</body>

</html>

JavaScript's role in application development is primarily focused on the user interface. JavaScript allows for remote calls (AJAX) to more complex programming languages. It is also used to produce things like charts and graphs from data sets.

Modern JavaScript also allows for things like animation, and some basic data storage on the client machine in HTML5.

By itself, JavaScript is limited by the fact that it has very limited access to the client machine, and no direct access to remote data. But JS is completely irreplaceable when it comes to creating intuitive, reactive interfaces for the web.