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ch13To assist the scripter in working with these elements, the browser and JavaScript implements them as software objects. This chapter begins by helping you understand that the realm of possibilities for each JavaScript object is the key to knowing how you can use JavaScript to convert an idea into a useful Web page. As described briefly in Chapter 2, the environment you will come to know as JavaScript scripting is composed of two quite separate pieces: the core JavaScript language and the document object models of "things" you script with the language. The only visible differences to the HTML code for defining those objects are the one or more optional attributes specifically dedicated to JavaScript. By and large, these attributes specify the event you want the user interface element to react to and what JavaScript should do when the user takes that action. JavaScript interpreters also know to ignore a line that begins with the HTML beginning comment sequence, but the interpreterDazzlerMax 55 release notesHowever, the Java player applet interprets the script as JavaScript and will make function calls to Java functions accessible on the webpage the applet is called from. Variables can be passed back and forth : e.g. myVar = myJavaScriptFunction1( {StudentName} ) A user-defined Javascript file is also scanned to create a list of JavaScript functions for use by the Script Action. The HTML file generated the Packager will also contain additional information to tell the DazzlerMax Java Player to switch on additional code to communicate with a SCORM 1.2 LMS. through a JavaScript "wrapper" file called dazzlermaxscorm1_2.js which gets included by the Packager. starts the DazzlerMax course by launching the HTML file, the DazzlerMax Java Player will call various functions in the JavaScript wrapper file to let the LMS know that it is starting. When the course finishes it will again let the LSM know that via the function calls in the JavaScript wrapper. This JavaScript file also contains coverJAVASCRIPT skoch@rumms.uni-mannheim.de http://rummelplatz.uni-mannheim.de/ skoch/js/ German JavaScript-book & examples - http://www.dpunkt.de/javascript/ VOODOO'S INTRODUCTION TO JAVASCRIPT - What is JavaScript - JavaScript is not Java! - Running JavaScript - Embedding JavaScript into a HTML-page - Non-JavaScript browsers - Dropping objects ©1996,1997 by Stefan Koch e-mail:skoch@rumms.uni-mannheim.de http://rummelplatz.uni-mannheim.de/~skoch/js/ My german JavaScript-book: http://www.dpunkt.de/javascript/Working with Scalable Vector Graphics Welcome Ali Hanyaloglu Applications Engineer, ePaper Agenda What is SVG ? SVG File Example Declarative Animation (tag-based) JavaScript Animation JavaScript Event Handling (works w/ HTML) Dynamic Generation (server/client-side) CGI Script or JavaScript Generation - JavaScript was to be used to develop logic components - Editing of HTML, XML and JavaScript was done using NotePad SVG Generated Smart Graphics [SMG] No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, magnetic, recording, faxing, or any type of information storage and retrieval system without written permission from VisibooksT, LLC, 3408A Stuart Avenue, Richmond, VA 23221. VisibooksT is a trademark of Visibooks, LLC. All brand and product names in this book are trademarks or registered trademarks of their respective companies. VisibooksT makes every effort to ensure that the information in this book is accurate. However, VisibooksT makes no warranty, expressed or implied, with respect to the accuracy, quality, reliability, or freedom from error of this document or the products described in it. VisibooksT makes no representation or warranty with respect to this book's contents, and specifically disclaims any implied warranties or fitness for any particular purpose. Additional resources for acquiring expert-level HTML and Javascript Document4Stupid JavaScript Security Tricks Some of these issues in the use of the JavaScript language are explored, and some example scripts that exploit these issues areshown. Netscape Navigator holds about 70% of the browser market share, and its "JavaScript" scripting language provides a good example of how a number of nasty security "tricks" can be played on the innocent web user. This does not mean that other browsers are safe to use - each one has its own set of security problems, some identical to the ones found in JavaScript-enabled browsers. At the same time, there seems to be some confusion between "Java" the SUN Microsystems-invented client/server programming language, the "JavaScript" scripting language from Netscape Communications, and the "ActiveX" scripting language from Microsoft. The JavaScript Security Tricks As shown on the accompanying slides, there are a number of potential security problems associated with JavaScript, most of which can be solved by keepingGetting Started with Orbjson: Short VersionAn Orbjson application has three basic parts: a client (typically a Web browser executing JavaScript), one or more Ruby classes implementing some set of services, and an instance of Orbjson to act as the go-between. JSON is the JavaScript Object Notation, and it allows you to describe native JavaScript data types as text. There are a few GPL JavaScript libraries to handle this for the client, and one is included with the Orbjson distribution. There should now be lib-list subdirectory with a Ruby file named server.rb, a configuration file named config.yml, and a /scripts subdirectory with two JavaScript files: jsonrpc.js and jsonrpc_async.js. Let's see what each of these files do, and what's needed to flesh out the application. Let's call it index.html. Orbjson provides the core JavaScript need to exchange messages with the server; you just need to invoke it and work with the resulting objects. This example will use asynchronous messaging; if you prefer to use the synchronousnyphp2_pdfAll business logic is centralized in the form of a central PHP-driven hub Both administrators and end-user can access the same business hub Administrators use a rich web client, delivered on-demand to Firefox End-users use any generic HTML-based browser Thus the same data can be accessed and modified by different web clients that access a single central engine. Thus code duplication between administrator and end-user functionality is avoided. End-user website can be displayed using PHP 4, PHP 5 or even (heaven forbid) ASP.net. Real time response reflected in user interface Provides 'rich', instead of 'flat' experience Leverages Mozilla platform for improved user interface widgets (such as editable combo boxes) Tabbed display paradigm enables easy editing of large number of data fields Recipe Ingredients * Add some PHP code to make a yummy index.php file * Add some (well a lot of, actually) XUL and JavaScript code to the index.php file so that it can 'talk to' the XML-RPCMTI.pptCSS is the most common error recently. IE does not support full CSS2 IE's ActiveX and filter: is not supported JavaScript Error? Mostly only small piece of code needs to be modified Fix it if you can access the page, or ask the site maintainer to do so. Or, Save the page and change it locally Use "JavaScript Console" to see if any error occurs, and click will bring you to the location of source The most common error is "Cannot find object: XXXX" which is due to IE's syntax. Try to make your page available to Gecko, IE, and text-based like lynx You may choose the best presentation target, like Gecko and IE JavaScript should run on most browsers 2. If you want to specify the size, use JavaScript and assign. Write native code to do low level API Provide an interface for JavaScript to call Like most OO Models with interface/implementationThe JavaScript language is used to enhance the client-side display of web pages. JavaScript code is downloaded into browsers and executed on-the-fly by an embedded inter-preter. We propose an approach to solve this problem that is based on monitoring JavaScript code execution and com-paring the execution to high-level policies, to detect mali - cious code behavior. To achieve this goal it is necessary to provide a mechanism to audit the execution of JavaScript code. This paper presents the first existing implemen-tation of an auditing system for JavaScript interpreters an d discusses the pitfalls and lessons learned in developing th e auditing mechanism. A s with other mobile code schemes, malicious JavaScript pro-grams can take advantage of the fact that they are executed in a foreign environment that contains private and valuable information. The JavaScript sand-box is similar to the Java sand-box, but it is more restrictiv e since JavaScript does not provide any Note: The functions I'll be discussing today: show_jscript() and select_gallery() require at least a basic knowledge of the JavaScript programming language in order to be understood completely. If you are unfamiliar with JavaScript you will still be able to use the script, however I will only be discussing the JavaScript code itself as PHP relates to it. Furthermore, the AutoGallery class also uses an HTML select box coupled with JavaScript code to allow the viewing user to switch between galleries quickly and easily. In order for this system to work smoothly, the final HTML/JavaScript code sent to the web browser by PHP must have a similar form to the following skeleton HTML template: The first function show_jscript() will display all of the necessary JavaScript code within the <HEAD> tags of the document. The second and third functions select_gallery() and thumbnail_table() deal with the HTML and JavaScript output that handles the rendering of the gallery When you're stopped in Netscape JavaScript Debugger, you cannot use many features of Communicator. The JavaScript debugger creates a separate Source View window for each HTML page you open in the debugger. The console is active only while JavaScript execution is stopped. - The bottom part is an input window in which you can type JavaScript expressions. As soon as it encounters JavaScript code on the page, it stops execution and opens a Source View window containing the HTML source for that page. Setting an interrupt tells the JavaScript interpreter to halt execution as soon as it can. If JavaScript code is running when you set the interrupt, the interpreter immediately halts execution and activates the debugger. If JavaScript code is not running when you set the interrupt, the interpreter waits until some JavaScript code executes. This is the simplest way to start debugging a particular page containing JavaScript code.cplanjvThis module provides a highly practical introduction to JavaScript and the design of dynamic web pages. Using an active learning approach step by step you will learn how to design and build dynamic web pages while completing Hands-on Exercises. The Learning Zone also contains background information, guidance and useful reference material. Students can compile these notes if they feel they are useful. JavaScript Programme Writing out a simple message using JavaScript code. Changing the property of an object; objects have methods & properties Creating functions; using JavaScript comments Creating a rollover image using the onClick and onMouseOver events to change the src property; the problem with Netscape 4 Create prompt and confirm boxes; some methods can take only one argument; how to capture input from pop-up boxes using variables; the undefined value core JavaScript; how to make decisions; programming syntax; equality operator; true and false Boolean values create1Define the term foreign key. i. Suggest the datatypes that should be used for each of the fields in the above table. ii. Suggest a field from the above table, which can be set as the primary key. d) What is the full form of MPEG? What kinds of files are stored using the MPEG file format? Name any two formats in which a Flash movie can be published. Questions given below are based on JavaScript: Point the errors in the following Javascript code and write the corrected script. Write the JavaScript code to be embedded in the above HTML code to open the corresponding website in a new window on the selection of any list item.ClickStart runs this as one course, the two parts cannot be taken separately. JavaScript Fundamentals is a two-day course that teaches developers how to use the features of the JavaScript language and design clientside, platform-independent solutions. Students learn how to write JavaScript programs, script for the JavaScript object model, control program flow, validate forms, animate images, target frames, and create cookies. Students will also understand and use the most popular applications of JavaScript 1.2. ENTRY REQUIREMENTS Students must have CIW Foundations certification or equivalent experience, and be proficient in Hypertext Markup Language (HTML) authoring. No previous programming experience is required. Upon successful completion of this course, you will be able to: METHODOLOGY Information in this document is subject to change without notice. IML Tools Manual IML Tools are for scientists and engineers creating their own measurement, control and analysis applications. You can use the Tools directly from Windows applications like Excel or Access, from JavaScript code running on a web page or when program-ming in Visual Basic and other languages. The Tools extend the capabilities of your spreadsheet, data-base or programming language. You can use the IML Tools in JavaScript code on a web page. The Visual Basic, Excel and JavaScript examples given all view the IML Tools control as an object. Used in JavaScript when the datastring is not returned in the function call parameter. Use this after the ``IMLOpen'' method. .IMSName Returns the name of the setup file (not used in JavaScript). .ReadFromChannel (ChannelName, DataString) Reads a string from the specified channel and returns the reading in DataString.The channel name is that you chose in SetupIML | ||
