JavaScript allows for interactivity on web pages by manipulating HTML elements and reacting to user actions. It is a scripting language that runs in web browsers and is used to validate form input, detect browsers, and create dynamic content. JavaScript code is embedded within HTML pages and works together with HTML for content and CSS for presentation.
Java Script is one of the most pervasive languages found on the internet and World Wide Web. Java Script is useful in making web pages more interactive. The pages can be made to react to the actions of the users in the form of special effects, both visual and otherwise.
Java Script is one of the most pervasive languages found on the internet and World Wide Web. Java Script is useful in making web pages more interactive. The pages can be made to react to the actions of the users in the form of special effects, both visual and otherwise.
logical and arithmetic operators in java script .
switch in java script. if condition, else if condition and nested condition in java script
do , while , for Loops in java script.4 type of functions in java script.
ACT Academy provides training in web designing , Graphic Designing, CAD Designing, .NET, JAVA, PHP. We also have advance diploma courses in Web Designing, CAD Designing, Financial Accounting & Graphic Designing with 100% job assurance.
This is the presentation I was using when delivering the JavaScript Jump Start meetup on February 14th, 2022. More information about that meetup can be found at https://www.meetup.com/lifemichael/events/278743661/ You can find the video at https://youtu.be/F1e-KHTEKzo
Over 200 Pages of resources and code snippets to learn JavaScript and JavaScript DOM manipulation. JavaScript is the most popular web programming language and this eBook will help you learn more about JavaScript Coding
Monster JavaScript Course - 50+ projects and applicationsLaurence Svekis ✔
Get this Course
https://www.udemy.com/javascript-course-projects/?couponCode=SLIDESHARE
Portfolio builder loaded with projects and applications that you can use, extend on and enhance to add to your portfolio
JUST GOT BIGGER - more updates to come - YOU FOUND IT
Grow your portfolio - showcase what you can build with JavaScript
Learn JavaScript have fun with interactive and dynamic web applications.
Over 529 downloadable resources - 57 articles - 43+ hours on-demand video, 57 Sections
Over 614 HD video lessons
Over 51+ projects and web applications. Projects can be used as started projects to extend and enhance. All JavaScript focused.
4 downloadable ebook guides 200 pages and 3 x 60 pages - with code and resource links
No libraries JUST JAVASCRIPT and JAVASCRIPT DOM
This is the course you've been looking for..........
Everything you need to get started with JavaScript, expand your knowledge about using JavaScript, and more included.
It’s arrived, and bigger than expected!!!
For anyone who wants to supercharge their JavaScript learning - building and applying JavaScript to over 50 projects and challenges… this course is for YOU!!!!
From JavaScript beginners to all levels, course is presented in a fun interactive format that will challenge you. Move through the lessons of the course as you want to learn them, variety of ways to benefit from it. Learn alongside, try before you see the solution, try after you view the solution. It’s up to you! Unique format for learning encouraging you to try the code. Of course source code is included in every step of the way.
Most often asked for ARE PROJECTS - and this course delivers! Over 50 and will grow over time as more projects and challenges get added. You can select the projects you want to do or take them in order, it’s up to you.
Loaded with games and so many mini projects guaranteed to help you learn more about JavaScript and DOM manipulation. All JavaScript code no libraries or short cuts.
Explore how to apply JavaScript to create interactive and dynamic web content - that will impress your friends.
Extend on the projects and add them to your portfolio, to showcase skills you have learned.
Useful real world projects coded with simple JavaScript for developers of all levels.
No better way to learn than to try the code and produce something fun and useful with it. Learn to create amazing things with JavaScript bringing your web content to life.
This will keep you busy and provide you the opportunity to learn and experiment with code. Try it. All the projects are designed in a starter type format so that you can build on them and customize to make it your own.
Portfolio Builder 50+ projects
This course includes full introduction to coding with JavaScript, all core syntax and how to apply it to make things happen. Create your own code - loaded with challenges and code snippets.
JavaScript is the scripting language of the Web.
JavaScript is used in web pages to add functionality, validate forms, communicate with the server, and much more.
logical and arithmetic operators in java script .
switch in java script. if condition, else if condition and nested condition in java script
do , while , for Loops in java script.4 type of functions in java script.
ACT Academy provides training in web designing , Graphic Designing, CAD Designing, .NET, JAVA, PHP. We also have advance diploma courses in Web Designing, CAD Designing, Financial Accounting & Graphic Designing with 100% job assurance.
This is the presentation I was using when delivering the JavaScript Jump Start meetup on February 14th, 2022. More information about that meetup can be found at https://www.meetup.com/lifemichael/events/278743661/ You can find the video at https://youtu.be/F1e-KHTEKzo
Over 200 Pages of resources and code snippets to learn JavaScript and JavaScript DOM manipulation. JavaScript is the most popular web programming language and this eBook will help you learn more about JavaScript Coding
Monster JavaScript Course - 50+ projects and applicationsLaurence Svekis ✔
Get this Course
https://www.udemy.com/javascript-course-projects/?couponCode=SLIDESHARE
Portfolio builder loaded with projects and applications that you can use, extend on and enhance to add to your portfolio
JUST GOT BIGGER - more updates to come - YOU FOUND IT
Grow your portfolio - showcase what you can build with JavaScript
Learn JavaScript have fun with interactive and dynamic web applications.
Over 529 downloadable resources - 57 articles - 43+ hours on-demand video, 57 Sections
Over 614 HD video lessons
Over 51+ projects and web applications. Projects can be used as started projects to extend and enhance. All JavaScript focused.
4 downloadable ebook guides 200 pages and 3 x 60 pages - with code and resource links
No libraries JUST JAVASCRIPT and JAVASCRIPT DOM
This is the course you've been looking for..........
Everything you need to get started with JavaScript, expand your knowledge about using JavaScript, and more included.
It’s arrived, and bigger than expected!!!
For anyone who wants to supercharge their JavaScript learning - building and applying JavaScript to over 50 projects and challenges… this course is for YOU!!!!
From JavaScript beginners to all levels, course is presented in a fun interactive format that will challenge you. Move through the lessons of the course as you want to learn them, variety of ways to benefit from it. Learn alongside, try before you see the solution, try after you view the solution. It’s up to you! Unique format for learning encouraging you to try the code. Of course source code is included in every step of the way.
Most often asked for ARE PROJECTS - and this course delivers! Over 50 and will grow over time as more projects and challenges get added. You can select the projects you want to do or take them in order, it’s up to you.
Loaded with games and so many mini projects guaranteed to help you learn more about JavaScript and DOM manipulation. All JavaScript code no libraries or short cuts.
Explore how to apply JavaScript to create interactive and dynamic web content - that will impress your friends.
Extend on the projects and add them to your portfolio, to showcase skills you have learned.
Useful real world projects coded with simple JavaScript for developers of all levels.
No better way to learn than to try the code and produce something fun and useful with it. Learn to create amazing things with JavaScript bringing your web content to life.
This will keep you busy and provide you the opportunity to learn and experiment with code. Try it. All the projects are designed in a starter type format so that you can build on them and customize to make it your own.
Portfolio Builder 50+ projects
This course includes full introduction to coding with JavaScript, all core syntax and how to apply it to make things happen. Create your own code - loaded with challenges and code snippets.
JavaScript is the scripting language of the Web.
JavaScript is used in web pages to add functionality, validate forms, communicate with the server, and much more.
Introduction in the JavaScript Programming language typically used in the front end of Web Applications. More information can be found at : https://www.spiraltrain.nl/course-javascript-programming/?lang=en
An Introduction to JavaScript, Features, Why JavaScript, Available Programming Features in JavaScript, Some of List of Frameworks in JavaScript etc.
Thanks for watching.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
2. What is Java?
• Totally different
• A full programming language
• Much harder!
• A compiled language
• Independent of the web
• Sometimes used together
3. What is JavaScript?
• Browsers have limited functionality
• Text, images, tables, frames
• JavaScript allows for interactivity
• Browser/page manipulation
• Reacting to user actions
• A type of programming language
• Easy to learn
• Developed by Netscape
4. Java vs JavaScript
• Java - Programming Language (PL)
• Interactive Web Graphics
• Creating web browser applications
• Writing stand-alone applications
• JavaScript - Scripting Language
• Runs within the context of the Web browser
• Customizing pages based on browser version
• Visual Feedback to user actions
• Validating data entered on HTML Forms
• In reality, Java and JavaScript are unrelated…
5. JavaScript = ECMAScript
• JavaScript is an implementation of the ECMAScript language
standard. ECMA-262 is the official JavaScript standard.
• JavaScript was invented by Brendan Eich at Netscape (with
Navigator 2.0), and has appeared in all browsers since 1996.
• The official standardization was adopted by the
ECMA organization (an industry standardization association) in
1997.
• The ECMA standard (called ECMAScript-262) was approved as
an international ISO (ISO/IEC 16262) standard in 1998.
• The development is still in progress.
• ECMA-European Computer Manufacturers Association
6. What JavaScript is NOT
• JavaScript is -
• -- NOT Java
• -- NOT typically used for server-side processing, like PHP (PHP
Hypertext Preprocessor ) or ASP (Active Server Pages)
• -- NOT good for data-processing
• -- NOT as difficult to master as programming languages like C#
or Java
7. What Can JavaScript do?
• JavaScript gives HTML designers a programming tool
- HTML authors are normally not programmers, but JavaScript
is a scripting language with a very simple syntax! Almost
anyone can put small "snippets" of code into their HTML
pages
• JavaScript can react to events - A JavaScript can be set to
execute when something happens, like when a page has
finished loading or when a user clicks on an HTML element
8. Cont- JavaScript do’s
• JavaScript can manipulate HTML elements - A JavaScript can
read and change the content of an HTML element
• JavaScript can be used to validate data - A JavaScript can be used
to validate form input
• JavaScript can be used to detect the visitor's browser - A
JavaScript can be used to detect the visitor's browser, and -
depending on the browser - load another page specifically designed
for that browser
• JavaScript can be used to create cookies - A JavaScript can be
used to store and retrieve information on the visitor's computer
9. Learning JavaScript
• Special syntax to learn
• Learn the basics and then use other people's
(lots of free sites)
• Write it in a text editor, view results in browser
• You need to revise your HTML
• You need patience and good eyesight!
10. How Does JS Work?
• Embedded within HTML page
• View source
• Executes on client
• Fast, no connection needed once loaded
• Simple programming statements combined with HTML tags
• Interpreted (not compiled)
• No special tools required
11. “Three Legged Stool”
• -- JavaScript works with HTML & CSS (Cascading Style
Sheets)
• -- Content is separated from Presentation & Behavior
HTML
Content
CSS
(Cascading Style
Sheets)
Presentation
JavaScript
Behavior
12. Source Code
• The simplest JavaScript "Hello World" program is pretty much
as follows:
• 1: <script type="text/javascript">
• 2: <!-- to hide script contents from old browsers
• 3: document.write("Hello World!")
• 4: // end hiding contents from old browsers -->
• 5: </script>
13. Definition:
• Lines 1 and 5 are the HTML tags (<script> ... </script>) that
define what's between them as a script of some sort that is to
be executed by your browser.
• HTML itself doesn't care what kind of script it is and other
scripting languages besides JavaScript, e.g. VBScript or TCL,
may be supported by a browser. In this case the type attribute
of the SCRIPT tag declares the script to be JavaScript. These
are called "client-side" scripts to distinguish them from
"server-side" scripts that would be executed by the HTTP
server before it delivers the document.
• Note: You may see the language="JavaScript" attribute
appearing in a SCRIPT tag.
14. Def-2
• Lines 2 and 4 are very odd looking. Line 2 starts an HTML
comment, which ends at the end of line 4.
• Thus everything between them looks like an HTML comment
to browsers that don't support JavaScript.
• But a JavaScript interpreter will just ignore line 3, and will
treat line 4 as a JavaScript comment because it starts with "//".
15. JavaScript Allows
Interactivity
• Improve appearance
• Especially graphics
• Visual feedback
• Site navigation
• Perform calculations
• Validation of input
• Other technologies
20. HTML Forms and
JavaScript
• JavaScript is very good at processing user input in the web
browser
• HTML <form> elements receive input
• Forms and form elements have unique names
• Each unique element can be identified
• Uses JavaScript Document Object Model (DOM)
21. Naming Form Elements in
HTML
<form name="addressform">
Name: <input name="yourname"><br />
Phone: <input name="phone"><br />
Email: <input name="email"><br />
</form>
23. Using Form Data
Personalising an alert box
<form name="alertform">
Enter your name:
<input type="text" name="yourname">
<input type="button" value= "Go"
onClick="window.alert('Hello ' + →
document.alertform.yourname.value);">
</form>
Java is often confused with JavaScript. JavaScript was originally called LiveScript, but due to the popularity of Java at the time, it was renamed JavaScript . Java is different from JavaScript in a number of significant areas:
Java is a full programming language which can do just about anything - JavaScript isn&apos;t and can only do relatively simple things.
Java is much harder to learn and takes much longer to master.
Java is compiled. The language is not &apos;embedded&apos; or written in the page - it is self-contained as a separate file.
Java can be used/written totally independently from the web - JavaScript works with web browsers only.
They are sometimes used together - JavaScript can be used to &apos;control&apos; or configure Java &apos;applets&apos;.
This talk does not cover Java in any more detail.
A separate Netskills Training Module investigates the use of Java applets.
When the web was conceived, browsers were limited to text and image - later tables and frames. The extent to which they provided interactivity with the user was very limited. JavaScript was developed by Netscape as a simple programming language (often referred to as a scripting language). It is easy to learn and small sections of JavaScript can be added to a web page rather than needing to develop complicated programs. It was specially designed for web page interaction and manipulating the web browser and page elements. It is often used to respond to user actions such as mouse clicks.
Although developed by Netscape, and other variants exist, such as Jscript from Microsoft, a standard has been developed by the European Computer Manufacturers Association. It is known as ECMAScript, using the standard ECMA262, which can be found fully documented at the address on the slide.
To learn JavaScript you will need to learn some of its language syntax.
However, a good strategy is to learn the basics, and then use and adapt other people&apos;s JavaScript. There are plenty of sites on the internet offering free JavaScript (see slide 4) with the calculator example. Other useful addresses are provided in the notes of last slide.
As with HTML, JavaScript can be written in a text editor and viewed in a browser. As it is a programming language the syntax is quite strict (compared to HTML). It is also a good idea to make sure your HTML is up to scratch as this will save you time. The hands-on exercises contain an refresher exercise on HTML forms.
JavaScript is embedded/included within HTML. You can often see JavaScript in the source of a web page or it is provided for information on the page as with the calculator example.
JavaScript is mainly used as a client-side language - it downloads with the web page. Once the page has downloaded and is on the users&apos; machine, it is actually the web browser which then interprets the JavaScript instructions. JavaScript pages run quickly, you are not relying on an internet connection to a web server. Short pieces of JavaScript can be combined with HTML without the need to develop a fully blown program.
There are two types of computer language, compiled and interpreted. To write or edit a compiled language requires a special piece of software called a compiler. JavaScript belongs to the other category, called interpreted. In the case of JavaScript, this interpretation is done by the browser software at run-time. Because JavaScript is interpreted, this means that no special tools are required to write or edit JavaScript, just a normal text editor. JavaScript web pages can be platform independent i.e. they will run on different browsers and computers (as long as the browser is JavaScript enabled). If you see a JavaScript web page that you like, you may be able to take that JavaScript and use it for your own purposes. (Remember to acknowledge the original author!)
Examples should be shown which demonstrate different uses of JavaScript. For example, try the calculator example at the address shown.
JavaScript can provide interactivity and/or enhance pages in several ways. It is particularly good at manipulating browser elements and images to improve page presentation and navigation.
As a programming language it can handle quite complex calculations and control the behaviour of embedded content including images.
A useful function is input validation - checking form responses BEFORE the form is sent for processing to a server. In this way it can be quicker and more user friendly, providing immediate feedback to the user.
JavaScript can be combined with other technologies such as Java applets or plug-ins, but this is beyond the scope of this presentation.
JavaScript can be contained either in the header section of an HTML page or in the body. This JavaScript statement is shown as a pure JavaScript statement within SCRIPT tags.
Notice that there is no HTML in the body of this page at all. (Demonstrate what this JavaScript looks like in a web browser).
This statement writes a line of text on a web page.
The command document.write is a standard function in JavaScript to write text to the page. The following is a more technical explanation for background information only:
document.write is derived from the JavaScript object model (not covered in detail here). It works on the principle that all document and browser elements have an object name (document, window, image etc) and can each has various properties that can be manipulated. The object hierarchy means that individual elements can be uniquely identified i.e. document.myform.mytext would refer to the text entry named mytext within the form called myform within the current page (document).
The arrow symbol &apos;&apos; is used in these slides and in the workbook to indicate where a JavaScript statement should be typed on one line without a break. A line break in the wrong place will stop JavaScript from working.e.g.
document.write(&apos;This is my first
JavaScript Page&apos;);
should actually be typed:
document.write(&apos;This is my first JavaScript Page&apos;);
This example demonstrates that anything included within the quotes in the document.write statement is printed to the screen, and this includes HTML tags. The &lt;h1&gt; tag is delivered to the browser along with the text, and the browser would interpret it as a normal HTML file, displaying the text in the Heading 1 style.
IMPORTANT NOTE:
This example shows a JavaScript statement in the &lt;body&gt; of the web page.
It is possible to include JavaScript statements in the &lt;head&gt; section of a web page but care must be taken that they do not try to access items that don&apos;t exist until the page has loaded (e.g. form elements, links, images). The web browser parses (reads through and executes) any script commands as it displays the page.
In most cases it is common sense that dictates where a statement should be placed.
If, in the above example, document.write was placed in the &lt;head&gt; of the page, the text &quot;This is my first JavaScript Page&quot; would appear in the &lt;head&gt; of the finished page – this would be incorrect – although modern browsers will let you get away with it!
In some circumstances you may wish to use document.write in the &lt;head&gt; - for example to dynamically generate &lt;meta&gt; or &lt;title&gt; tags. Such uses are not considered here.
JavaScript functions are typically defined in the &lt;head&gt; section of a web page as they do not normally execute until they have been triggered elsewhere. The use of functions in JavaScript is covered in the Netskills Training Module: &quot;Further JavaScript (Enhancing JavaScript with Functions and Events)&quot;
Compare this example with the previous one. This time the JavaScript is written inside the HTML tags and there are no &lt;script&gt; tags.
In this case if the browser is JavaScript-enabled it will process the commands when it needs to. If the browser doesn&apos;t understand JavaScript it will ignore the extra code (it should see it as an HTML attribute that it cannot process and therefore ignores, although very old browsers my throw an error)
This example demonstrates an HTML hyperlink, but notice the JavaScript enclosed within the &lt;a href.. tag of the second link.
onMouseOver is referring to an event. That is, this JavaScript will happen in response to something that the user does e.g click a button, or in this case, when they move the mouse over the link (this will not happen if you move your mouse over the first link!).
window.alert will display what is called an alert box on the screen containing the text specified, in this case, &quot;hello&quot;.
The first link will behave normally.
(See separate Netskills Training Module for more details on Functions and Events in JavaScript.)
This example shows two separate statements. The first is some pure JavaScript so must be contained within &lt;script&gt; tags. It displays a pop up box with the message &quot;Enter your name&quot; and a space to type in text. This occurs immediately when the page loads.
The second statement is within an HTML form. The &lt;input&gt; tag includes some JavaScript within it. The tag creates a form element (a button) and associates with it some JavaScript. The JavaScript responds to the mouse click event (onClick) on the button by producing a pop up alert box with the text &apos;Hello&apos; in. This only occurs when the user triggers the event by clicking on the button.
JavaScript makes use of both single and double quotes. They are used in this example to have a text string &apos;Hello&apos; contained within another string which defines the code to be carried out in response to the onClick event. It is important that the quotes should match - if they don&apos;t, your JavaScript will not work!
JavaScript is very useful for processing and manipulating user input and form elements.
A common way of obtaining input is via the HTML &lt;form&gt; elements which can provide text entry boxes, selection boxes, menus and buttons. Form elements can be named and hence uniquely identified within the JavaScript object model.
This example shows a simple form. Notice the name attribute is used at all points - to name the form, and to name each element within the form.
How JavaScript uses the name attribute is described next.
To refer to the value that a user has typed in a text box, you use the following naming system:
document.formname.elementname.value
This is a naming convention derived from the JavaScript object model:
document refers to the page displayed in the browser.
formname is supplied by the page author as the name attribute of the &lt;form&gt; tag - in the example it is addressform and refers to the whole form.
elementname is supplied by the page author using the name attribute of the &lt;input&gt; tag.
value is a predefined term which refers to the text typed in by the user.
This simple code creates a form called alertform.
The JavaScript is activated when &apos;Go&apos; button is pressed (an onClick event - see separate Netskills Training Module for more details on Functions and Events in JavaScript). The current value of the element yourname would be displayed in a an alert box.