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JavaScript in a Nutshell Background on JavaScript What can JavaScript
do? JavaScript tips Profile on Javascript ªJavascript ªJavascript != Java
ªJava is object-oriented ªJava is class-based, strong-typing What can Javascript
do? - http://itc.chem.columbia.edu/chemistry/chem-c1404/ http://www.columbia.edu/itc/itc/webdev/webauthor.html
JavaScript syntax [1998] Web Browser as Medical Educator/Researcher using HTML & JavaScriptThe Hypertutorial Model is a framework for designing student-centered instruction. Previous research shows (see Johnson & Grover, 1993 for a brief review) that for each factor, superior implementation results in superior learning. The Hypertutorial Model is particularly appropriate for Web-based instruction because not only can the presentation, practice, feedback and learner control features be implemented efficiently and effectively in HTML/JavaScript, but hyperlinks make elaborative learning resources instantly accessible. The purpose of this communication is to demonstrate and briefly explain the workings of a browser-based hypertutor multimedia instructional system called Biostatistics for the Clinician. The system delivers biostatistics instruction as well as automated collection and processing of performance data. Biostatistics for the Clinician, written completely in HTML and JavaScript, has been used in the delivery, via the Web, of the biostatistics component Get a head start in ArcIMS web development and learn to use Dynamic HTML to create interactive maps and communicate with ArcIMS servers using ArcXML. In this course experienced programmers will gain insight into the inner workings of the HTML Viewer and build a firm foundation for creating their own ArcIMS clients. Participants will learn to take advantage of HTML, JavaScript, Cascading Style Sheets and the Document Object Model to create GIS applications that run completely within a web browser. Understanding tools and buttons Customizing and adding functionality to the HTML Viewer: Identifying all visible features in an ArcIMS Service; Hiding layers in the legend and layer list; Passing parameters to the viewer; Adding options; Putting the overview map in a separate frame; Adding new tools and buttons Prerequisites and recommendations It is mandatory that participants complete Introduction to ArcIMS or have equivalent experience with the terms and theories used JavaScript Language SpecificationAlthough JavaScript was originally implemented as a scripting language supplement to HTML in Netscape Navigator and LiveWire, this specification does not prescribe any particular application; the language itself is flexible and apt for many applications. Since this specification does not describe any specific mechanism for JavaScript to display output, examples suppose a simple println function that displays values to the user. This chapter describes the lexical structure of JavaScript by specifying the language's lexical grammar. This definition of lines determines the line numbers produced by a JavaScript compiler or other system component. This is equivalent to compile-time error-correction in which JavaScript inserts semicolons as neccessary. JavaScript is a dynamically-typed language, which means that the datatypes of variables are not declared, and the datatypes of variables and expressions are determined at run time. A number can be either an integerVcommerce is looking for a Senior Web Interface Engineer to extend its industry leading web-based commerce platform. We are looking for an individual that has the desire and capability to create advanced web-based application interfaces. If you consider yourself a DHTML expert, (think http://my.msn.com) then this is your dream job! Vcommerce is the leading provider of multi-channel retail solutions. Vcommerce provides proven solutions to capture, source and manage orders in multi-channel retail environments, that dramatically minimize risks, increase efficiencies and reduce costs associated with multi-channel initiatives. Vcommerce provides services and tools to companies such as Overstock.com, Sony Playstation, GE and Univision.com. Vcommerce is a fast paced company where employees enjoy working in an energized work environment that encourages innovation and rewards results. Vcommerce offers a competitive benefits package that includes medical, dental and vision insurance, SUGI 26: JavaScript Tutorial by ExampleThis paper presents a code walk-thru for a JavaScript application designed to construct a call for a SAS macro. It is intended to help you learn the basics of JavaScript by example. It is not a comprehensive JavaScript tutorial: you are encouraged to consult books on JavaScript to read more about the techniques. User input can be processed and validated on a client by JavaScript. By naming the frames, we will be able to refer to them from within our JavaScript code. This page uses frames but your browser does not support them </noframes> </frameset> </html> The first three lines of the JavaScript code maximize the size of the window before it is displayed. The opening tag gives the form a name - so we can refer to it in JavaScript code. By specifying a NAME for a form field, we can easily refer to it in JavaScript code. A function code used on this page, is defined inside a HEAD tag: showInfo(), as well as the rest of JavaScript <HEAD> <SCRIPT type="text/javascript"> functionSince JavaScript is loosely typed, it has few data types. Dot notation to modify referred objects. Operations do not have to be directly associated with an object. Functions and blocks of statements enclosed in curly braces. JavaScript evaluation expressions enclosed in parentheses. JavaScript array elements indicated using square brackets. HTML comments used to hide JavaScript from nonscript-handling browsers. Two basic ways that JavaScript can be used in web pages: Modify your home page to include JavaScript to determine the browser viewing the page and display a message indicating the browser used. JavaScript-WS2"Event Handler" are built-in JavaScript commands that wait for the user to do something (like clicking the mouse). The script below places the JavaScript redirection directly in an HTML link. If the user's browser supports JavaScript, when they click the link "Welcome to Our Site!", they will be taken to the "JSPage.htm". If the user's browser does not support JavaScript, when they click the link "Welcome to Our Site!", the user's browser will take them to the "NoJSPage.htm". The semicolon ( ; ) allows you to follow one JavaScript command for another. `JSPage.htm' is in single quotes ` ` because they are nested within double quotes and the browser may not interpret the code correctly if there would double quotes within double quotes. The JavaScript code consists of the lines below. They will only be read if the user's browser does support JavaScript. Without the JAVASCRIPT, the HTML code alone would be the code below where the first section indicates the page to load and theSUGI 27: Ask DSS Using htmSQL, JavaScript, and SAS(r) to Create Dynamic Web ApplicationsMacro code manages the dynamic decision making of which user and what data, and JavaScript within the web page manages the questions submitted and the necessary parameters to pass. We can maintain and revise our own code much easier, so we coupled existing tools with JavaScript and SAS macros. JavaScript coding within the web page. JavaScript Coding The next and most difficult step was writing the JavaScript to handle multiple queries under one form. When the user clicks on the "Ask" button next to the question they desire, it is a submit function and sends the parameters of the form to the JavaScript function. Because our JavaScript skills are limited and we have to nest this selection with the other functions, we simply pass the parameter to the SAS broker and make the determination in a SAS program. Rather than do the checking in the JavaScript function, we pass it along, missing or not and test for conditions in SAS. Form Handling - JavaScript Functions NowGLOBAL INTERACTIVE LEARNING SYSTEM ON THE WORLD WIDE WEB USING JAVASCRIPT PASSWORD TECHNOLOGYIn this paper, we describe how JavaScript password technology on a global scale can be used to enable navigation through interactive lecture notes and tutorials on the World Wide Web without any server-side programming. Using JavaScript password technology, an instructor can create a series of lecture notes with encrypted URLs that can be used by millions across national borders. That has changed, however, as the World Wide Web [Stout, 1996], HTML [Graham, 1995] and JavaScript [McComb, 1996] have become more accessible. The addition of scripting languages--like JavaScript [Netscape Communications Corporation, 1996] or VBScript [Microsoft, 1997]--allow for more complex and rich interaction between students and their "virtual" tutors across national borders. While HTML capabilities keep improving and new standards are adopted, some basic client side programming using JavaScript can substantially enhance the interactivity of HTML pages. With a few lines of client-sideLanguage used for adding dynamism to Web pages. Be used to validate data. JavaScript 2.0 is in the works. Dynamism takes three forms: Events: Allows you to monitor events and change positioning or content based on events. Dynamic positioning: Can tell the browser where to place content without using tables. One of the primary uses of JavaScript is to make Web pages interactive. JavaScript provides event handlers. Write the JavaScript function to modify the DOM element with the name attribute. Write a JavaScript function that pops up an alert when the user has entered their name. Using JavaScript to Develop Interactive Self-AssessmentsThis paper looks at the effectiveness of self-assessments as a business tool and the use of JavaScript for supporting the interactive elements. Interactive self-assessments can be developed using several different methods: HTML, JavaScript, Active Server Pages (ASP), or Common Gateway Interface (CGI), to name a few. WHAT IS JAVASCRIPT? JavaScript (developed by Sun Microsystems working with Netscape's LiveScript scripting language) is a scripting language that is used primarily with HTML to add interactivity to otherwise static Web pages and forms. Being a scripting application and not a programming language, JavaScript requires less code and is interpreted by the browser (not compiled). You can develop interactive self-assessments without using JavaScript, but JavaScript offers more functionality than HTML alone (hence JavaScript being referred to as an extension of HTML). JavaScript is easier to use and more efficient than CGI, but there are some things CGI can do'98-Jivin' with (Java and) JavaScriptJavaT and JavaScriptT* are two of the newest "kids on the block" when it comes to the latest developments for the computing and Internet world. Already, JavaScripts are nearly ubiquitous on the World Wide Web, largely because of their cross-platform nature and ease of use. While relatively few technical communicators will deal directly with JavaScripts and even fewer with Java programming, those involved in Web page development and online (HTML) documentation will find them valuable to learn and use. And a large part of what's fueling the Web these days is a new programming language called Java and its younger sibling JavaScript. What is JavaScript? JavaScript. The idea behind JavaScript was to make it possible for non-programmers to use the power and flexibility of Java without having to become programmers themselves. JavaScript, as such then, is a scripting tool (or scripting language), not a full-blown programming language. It is important to note here that JavaScript wasInteractive Teaching Materials in PDF using JavaScriptAbstract The use of JavaScript scripting language for adding interactivity to portable teaching materials of a high typographical quality in PDF file format is described. An extended version of the program TEX called pdfTEX is extremely useful for such purposes. It is shown that applications similar to those done by a CGI scripting on the web can be done in PDF, exploiting Acrobat forms and the embedded JavaScript engine implementation in Acrobat Reader or other PDF viewers. Petr Sojka: Interactive Teaching Materials in PDF using JavaScript Thessaloniki, July 2nd, 2003, Different students, different transport media (paper, braille, electronic digital format), different teaching materials. Design appropriate for classical textbook is not appropriate for electronic book to be read on the computer screen (different aspect ratio, different resolution, colors, possibilities of interaction). icons for form buttons in TEX macros to automatize the generationNetscape has online JavaScript client reference at developer.netscape.com When the parser sees the <script> tag it stops parsing the document and interprets the JavaScript code. Later we will discuss the document object model (DOM) that lets JavaScript interact with the elements of an HTML document. For now we will use document.write() to produce HTML output using JavaScript. JavaScript Variables JavaScript is an untyped language so a variable can hold any kind of value. JavaScript is case-sensitive Just because JavaScript is untyped doesn't mean that there are no data types: Number type Like Java, the literals true and false are the values of a boolean variable in JavaScript Unlike Java, JavaScript can convert them to 1 and 0 to use in expressions as needed The technique used to embed a Cult3D object in an HTML page in a way that is compatible both with Netscape Navigator, (version 2.0 or later) and Internet Explorer (version 3.0 or later), is a bit complex. Luckily, there is a "recipe" which you can follow, and which is described in the following sections. If you are not interested in the details, just read the sections "Preparing Your Web Server," "The Basic Recipe," and "Cult3D Viewer Plug-in Parameters," and have a look at the Examples in the last section. If you want to know what the various fixed attributes do, you may also want to read the section "Specific OBJECT and EMBED Element Attributes." If you want to understand why you have to do things in such a specific way, you should read the section below entitled "Some Technical Details." Preparing Your Web Server Example code for how to connect an event using JavaScript for Internet Explorer: Even though Microsoft Internet Explorer supports VBScript, we recommend you to | ||
