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JavaScript Includes.pmdITS uses JavaScript to build the elements that will be common to several pages within an Internet site. In fact, the header, footer, and left navigation of the eDG site are all constructed using JavaScript. By using "JavaScript Includes," along with Cascading Style Sheets (CSS), entire sites can be updated to reflect a new look quickly and efficiently. There are probably as many ways to create an include using JavaScript as there are Web developers working for the State. Basically, it will go through the steps of using a JavaScript document.write function to create the eDG left navigation in an HTML table. Note: HTML or JavaScript code quoted in this tutorial is displayed in red using the Courier New typeface. For the sake of simplicity, let Dreamweaver use its own JavaScript functions to do any rollovers. If you have rollover functions or other Macromedia JavaScript behaviors in your table code, you will notice the Macromedia JavaScript functions listed between the <head>JavaScript_Web_PagProgrammingLincoln Land Community College Capital City Center 130 West Mason Springfield, IL 62702 217-782-7436 www.llcc.edu/ccc JavaScript Web Page Programming Course Description: This course makes extensive use of hands-on examples and exercises in order to teach web page developers how to create more robust and dynamic web pages using the JavaScript programming language. Participants will learn how to write functions, how to respond to user initiated events, how to validate user input to web pages, and how to provide feedback via dialog boxes and alert controls. ch02.pm6with JavaScript <title>A Basic Web Page</title> </head> <body bgcolor="white" text="black"> <h1>My Web Page</h1> <SCRIPT type="text/javascript"type="text/javascript"><!--document.write("Hello, World!") // --> </script> </body> </html> <title>Placing JavaScript Statements Appropriately</title> <SCRIPT type="text/javascript" type="text/javascript"><!--var visitor = prompt("What is your name?", "") // --> </script> </head> <body> </body> </html> 8 </head> 9 <body> 10 11 </body> 12 </html> <html> <head> <title>Placing JavaScript Statements Illegally</title> <SCRIPT type="text/javascript"type="text/javascript"><!--document.write("<h1>Hello, I am in the wrong place.</h1>") // --> </script> 1 <html> 2 <head> 3 <title>Placing JavaScript Statements Appropriately</title> 4 <SCRIPT type="text/javascript"type="text/javascript"><!--5 var visitor = prompt("What is your name?", "") 6 // --> 7 </script> 8 </head> 9 <body> 11 <SCRIPT type="text/javascript"type="text/javascript"><!--12ch01.pm6It is not a sub-language of It's OK to place spaces around the equals sign. It doesn't change the way the script works, but it does im-prove readability. Figure 1.16 Changing the Location You can save JavaScript statements using the javascript: pseudo-protocol as bookmarks and call them at any time to help you examine the results of scripts and assist with debugging. Here's how: 1. Type "javascript: " followed by the statement you'd like to invoke in the location bar. I put mine in a bookmark folder named "JavaScript Statements." 3. Currently, however, JavaScript is the only cross-browser, client-side language available for use in scripting event han-dlers.Very quick guide to JavaScript for Java programmers.pptVery quick guide to JavaScript for Java programmers Mark Dunlop : Mark Dunlop Example field completion function init(form) { // puts the date (in non-US format into the date field of form date = new Date(); form.date.value=date.getDate()+"/"+ (date.getMonth()+1)+"/"+date.getFullYear(); } - to call add info to body tag of HTML page and to form tag <body onload="init(this.form);"> <form action="xx.php" method="POST" name="form"> : Mark Dunlop - Functions replace methods in typical JavaScript these are non-OOJavaScript- Consider that a break in each case is required or not - Go to the first line after the structure - Place break in while and for loops is generally not recommended - The continue statement is used in while and for loops - The statements after continue will be skipped - Array elements are not initialized when declared - Take action if an event is triggered - Usually associated with an image or a link - Usually used with text boxes or text areasclient-server architecture, computation is done either in the client or in the server - There are cases where we can choose whether to perform the computation in the client or in the server - There are cases where we cannot choose where to perform the computation - An applet is a Java class that runs in a frame that is embedded in a Web page - When a browser loads the Web page, the applet byte-code ( .class file) is downloaded to the client box and executed by the browser - The latest version is ECMAScript 3, and it is equivalent to JavaScript 1.5 - JavaScript is typically executed by Web browsers and not as stand-alone applications - JavaScript variables are recognized inside their declaration scope - JavaScript objects are similar to associative arrays JavascriptJava accomplished some of the client-side tasks, but separate from HTML JavaScript is less cumbersome, fully integrated into HTML M icrosoft got involved with its own version, JScript, supported by IE F inally turned the language over to ECMA to develop international standards - JavaScript uses the <SCRIPT> tag in HTML to tell the browser how to interpret the script Wanted to improve interaction on the web Wanted the option of client-side applications Sc ripting was the obvious solution Netscape started developing LiveScript to answer these questions Once Java was introduced, Netscape began to work with S un on JavaScript - JavaScripts are downloaded by the browser as part of the webpage - Let frames "talk" to each other so you can change information in one frame without having to reload the entire webpage - These are the HTML identifiers that tell the browser that the page is using a scripting language. JavaScript separated into two parts of the <HTML> document - LookEXT: Body onEvents Javascript3 Anyway, this script is intended to make easy the inserting of javascript codes into these event handlers: onload onmouseup onmousemove For example, If your designer made an HTML template with a "preloadImages" function for its rollover efect; and after that you inserted the "includeLibs.myMenu = media/scripts/gmenu_foldout.php" code into your typo3 template, you will end with two Global Scope: If this javascript call should work on a global scope, that is, in all the site, check this. Javascript Call: This is the code that will be appended to the event handler at the BODY tag. Important: You have to comply the javascript syntax, and add a ";" semicolon at the end of each line. The place where you put your Record, if the javascript call has a local scope, is important. For local javascript calls, it will be used only on the specific page it is located. On the other hand, you can put global scope javascript calls anywhere in your tree. page.1013 > EXT: BodyJavascript_Rollover_InstructionsJavascript Rollover Instructions 1: Save the stamp and rollover images in a directory called "graphics". 2: Insert the following Javascript in your web page header. <SCRIPT type="text/javascript"> <!-- function MM_swapImgRestore() { //v3.0 var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc; } function MM_preloadImages() { //v3.0 var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array(); var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++) if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}} } function MM_findObj(n, d) { //v4.0 var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) { d=parent.frames[n.substring(p+1)]ument; n=n.substring(0,p);} if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n]; for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i]ument); if(!x && document.getElementById) x=document.getElementById(n);JavaScript The JavaScript For Developers training course from LearnKey starts with core concepts and takes you step-by-step through the process of creating richer, more dynamic client-side Web pages using JavaScript. At the conclu-sion of this course you'll understand how to effec-tively use JavaScript to develop interactive client-side Web pages. JavaScript - Origins of JavaScript - JavaScript Versions - JavaScript from Netscape - How JavaScript Runs Section D: JavaScript Syntax This month, we consider a specific JavaScript example that illustrates the basic concepts of client-side scripting. To do this, we'll develop a simple appli-cation using JavaScript. JavaScript provides all of this functional-ity quite easily. While JavaScript is not object-oriented, it is object-based, which means there is a notion of objects with properties and methods. Agents that implement JavaScript interpreters (such as Netscape Communi-cations Corp.'s Navigator and Microsoft Corp.'s Internet Explorer) define a set of standard objects relating to the agent and the documents displayed by the agent. Windows are referred to in JavaScript by their instance variables, and a new window is created with the open method: This method opens a new Web browser window named windowName (which can be used to refer to this window outside of JavaScript), using URL as the home document, and with the properties set by JavaScript in HTML JavaScript is included in HTML documents using the JavaScript in easy stepsJavaScript in easy steps Two lines of code need to be changed in the listed example on page 169 to use the document.getElementById() method that is favored by modern browsers. The last line of code in the statement block that starts with the comment "// change direction at the right extreme" should be changed to document.getElementById("boat_image").src = "sail_l.gif"; And the last line of code in the statement block that starts with the comment "// change direction at the left extreme" should be changed to document.getElementById("boat_image").src = "sail_r.gif"; The amended version has tested OK in Internet Explorer, Mozilla and Opera on Windows and in Konqueror on Linux. Updated listed examples are available from the Downloads section of the in easy steps website, http://www.ineasysteps.com/books/downloads/JavaScript Bible 5th Edition Quick ReferenceThe three columns in each box list the object's properties,methods, and event handlers in that order. Read the compatibility guides for each section. Numbers in the upper right corners of object squares are chapter numbers in which the object is covered in detail. Basic browser and operating system notation codes are as follows: N -- Netscape Navigator (including Mozilla when N6 or higher) IE -- MS Internet Explorer W -- Windows MSIE M -- Macintosh MSIE See the accompanying file for printing and collating instructions in booklet or broadside configurations. Core JavaScript/JScript/ECMAScript Quick Reference If JavaScript can do it, you can do it too Premier JavaScript authority Danny Goodman teams up with developer/inventor Michael Morrison to help you bring your pages to life, whether you're a beginner or a JavaScript pro. Inside, you'll find complete coverage of JavaScript - Get up to speed fast on JavaScript basics with an updated tutorial tailored for newcomersquickjavascriptJavascript is not nearly as simple as HTML is, and requires program-ming skill to do anything substantial with it. However, there are some quick tricks you can do with JavaScript that don't require knowing the entire language. Using JavaScript, you can override what is shown in the status bar to give the user better feedback on what the destination of the link is. Using Javascript, you can create "rollover" graphics that change when the mouse moves over them. Get the pastelets and support files for these and other effects at www.leadingobject.com/ seminars/javascript. This Javascript pastelet allows you to set up graphics that have a 'rollover' state, so that when the mouse passes over it, it changes. The prototype is the actual builtin code and properties of images provided with JavaScript. By extend-ing that prototype, you can change the way JavaScript deals with images. It requires no extra code to hide from non-JavaScript-aware browsers, since they won't even see theIf the two operands are not of the same type, JavaScript attempts to convert the operands to an appropriate type for the comparison. The JavaScript runtime engine creates an Anchor object corresponding to each A tag in your document that supplies the NAME attribute. JavaScript calls the toString method automatically when an array is to be represented as a text value or when an array is referred to in a string concatenation. For a given form, the JavaScript runtime engine creates appropriate FileUpload objects and puts these objects in the elements array of the corresponding Form object. For a given form, the JavaScript runtime engine creates appropriate Hidden objects and puts these objects in the elements array of the corresponding Hidden object. The JavaScript runtime engine creates a Link object corresponding to each A and AREA tag in your document that supplies the HREF attribute. JavaScript versions 1.1 and later check for all newline characters before setting a ADV Javascript outlineThis class provides you with the concepts and skills to use even more features of JavaScript. You get hands-on practice working with more advanced coding techniques such as custom objects, arrays, and applets. While we will make every reasonable effort to help, students with insufficient skills may be required to observe the class lessons or do their best to keep up without slowing down the rest of the class. Those wishing to enhance their skills in JavaScript in order to add functionality to Websites, as well as to learn ways to relate JavaScript to other applications. Pricing Advanced JavaScript is a two-day course for $845. Class time is 9:00 a.m.- 4:00 p.m. Breaks are scheduled throughout the day and lunch is typically scheduled 12-1. Students provide their own lunch. We recommend the following courses that relate to this class: Foundations of HTML and JavaScript Programming Fundamentals. 1 | 2
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