javascript

First, if you've read this series faithfully, you know how to use the DOM, a JavaScript-friendly API with which you can manipulate XML.

With these security considerations in mind and a working applet, we are now ready to use the applet from JavaScript.

In just a few lines of code, you're intercepting the normal submittal of an HTML form and executing some custom JavaScript code instead.

In a real application, you would be likely to put a library of useful JavaScript functions into such an external file.

Next is the name of the JavaScript function that you want Flash to call when it gets a response from the server.

The first bit of the code uses basic JavaScript code to grab the values of a few form fields.

The DWR framework allows you to call methods on your Java classes directly from JavaScript code.

In the previous example, you've seen that it is possible to call Java methods from JavaScript.

One of your options is to embed JavaScript within the style sheet, either directly or as an external file.

It's very easy to sign up with 103bees and you only have to copy one line of Javascript code into the template file for your web site.

All that's really left is to call that first JavaScript method and start the whole process.

You can copy the JavaScript files contained in the unzipped release folder to your application server, as you would any other . js scripts.

You use the command line just like any other command line; it executes all the JavaScript you write as if it were part of the page.

Stay tuned for the next part of this series where you'll learn how to call remote JavaScript functions with Ajax.

You can always access and manipulate DOM from JavaScript, making it easy to handle it like a typical HTML control.

If you use the same JavaScript you used for your US client, you'll get a JavaScript error when it tries to create the Number object.

If the content is loaded into the page using JavaScript, they have no access to that content at all, even in its unsorted state.

The tab list for Firefox Mobile is implemented as a simple HTML page with a bit of JavaScript that loads in the data.

At this point, you're ready to add in JavaScript, images, and live navigation.

Because of the event-driven nature of JavaScript (and Node by extension), whatever you write with it is going to be very fast.

However, with a bit of JavaScript code, you can handle the client date selection event and do whatever you need.

The problem with XML in browser-based application development is the lack of a native, easy-to-use JavaScript parser.

As you know, you can use the Selector function from a JavaScript framework to easily select an element by its ID.

Using ajaxForm and a bit of custom JavaScript code, you can call ThickBox's tb_show method directly.

At first, we will use it a as part of an applet UI, but later the applet will just be used to make it available to JavaScript.

So you create a variable in JavaScript with var, give it a name (like "request" ), and then assign it to a new instance of XMLHttpRequest.

Libraries have been a huge contributor to the surge in popularity of JavaScript in the last few years.

Javascript: was this script language has many advantages, but search program not know any of the content.

If you assign this string to any JavaScript variable, the variable will accept the data in terms of an object.

One situation where the substitution of Java code for JavaScript might be appealing is in a team that lacks experienced Web developers.

The first, as you would imagine, converts a data object of any kind into a serialized set of data, ready for JavaScript to handle.

Even Javascript, once the bane of every web developer's life, has powerful idioms allowing AOP to be implemented easily.

It lets you create, manipulate, and use XML directly from JavaScript without requiring the use of any other XML library or API.

And that would be a very satisfying place to end, since JavaScript began as a scripting language for Java plug-ins.

Astro (node-xmpp): Mainstream adoption can be very easy one day because JavaScript is quite a popular language.

Now the application is ready to be compiled into JavaScript and be deployed.

It has always been a dream of mine to write Eclipse plug-ins in other languages like JavaScript, Groovy or Scala.

The early web would have been a rough place if sloppy JavaScript programming prohibited pages from loading.

Once compiled, these libraries can be called from C and JavaScript just as easily as it is called from . NET.

The ultimate goal of this process is to be able to use JavaScript code to analyze the retrieved data.

But, impressive as the script is, all it really does is offload the prefixing to JavaScript.

A JSON object like the one shown in Listing 1 can be inspected during development time using tools like FireBug or simple JavaScript alerts.

JavaScript happens to be a great fit for writing servers due to its event-driven nature.

The JavaAdapter class of the org. mozilla. javascript package makes it especially easy to add listeners to components in Rhino.

The parameter getModel refers to a JavaScript method that will be called with the result of this call passed as a method parameter.

You're also specifying JSON as the return type, which will make it easy to parse the data from JavaScript.

you could combine your own JavaScript files into a single output target containing your own application code.

As you see later in the article, the ability to use this data within the JavaScript client is immediate.

The big adjustment we faced was that there is no compile time checking with JavaScript.

For those with JavaScript, you want to make the large image show up in a lightbox overlay in the current window, not in a new window.

Using a separate file source for your JavaScript prevents you from being able to dynamically change your JavaScript.

Then the anchor tag around the word giraffe calls the JavaScript to bring up the pop-up.

Having completed the design of a finite state machine in Part 1, you are ready to implement the FadingTooltip widget in JavaScript.

Things have recently changed and I find JavaScript development to be some of the most exciting code I've written.

The next expression (the one starting with var photos) might be unfamiliar to even experienced JavaScript developers.

The entry point into a GWT application is a Java class whose compiled JavaScript is the script for a given page.

Next, take a look at the JavaScript code that responds to the Ajax invocation and displays the inventory, shown in Listing 4.

When a developer works on a CSS or JavaScript file, white space is usually a good thing.

Although its general page load performance lags a bit behind WebKit-based mobile browsers, it has a very fast JavaScript engine.

Image submit buttons work like the image link above, but they do not require JavaScript.

A good CSS, JavaScript, jQuery and HTML book will go very far, and none would be specific to any one server-side technology.

Developed a second PHP application that combines JavaScript with HTML for the front end.

A standalone JavaScript is not embedded as a resource in an assembly and therefore cannot access values in a resources file.

There is no concept of overloading, as JavaScript ignores any unexpected arguments and substitutes null for any that are missing.

As soon as you tab out of any input field in the table, JavaScript code attached to the onblur event runs.

The return data could also be in the form of JSON objects (JSON is basically a protocol for defining objects in JavaScript code).

This scenario demonstrates the additional performance cost of executing a simple piece of JavaScript on every event flow.

Next, you use Dojo's convenience function, dojo. formToObject, to turn all of the data from the form into a JavaScript object.

There are quite a few good tools to develop your JavaScript code, but I prefer to develop my applications with Jetbrains' Intellij IDEA.

Yes, all that JavaScript communications and data parsing code with lots of tricks for multi-browser support.

To see the JavaScript that the compiler is emitting, just choose the Pretty setting shown in Figure 1.

To help you rapidly deploy cross-platform mobile apps and websites, there's a wide range of JavaScript frameworks you can take advantage of.

One of the most interesting uses of closures in JavaScript is to simulate private variables of a class.

In Listing 5 you see a closure in which a JavaScript object (obj) contains a reference to a DOM object (referenced by the id "element" ).

Media Player comes in the form of a JavaScript library, which loads a lightweight Flash module responsible for playing an audio file.

Every user action that normally would generate an HTTP request takes the form of a JavaScript call to the Ajax engine instead.

You can use the onscrollidle option, which you haven't used in this example, to call JavaScript functions when scrolling pauses or stops.

If there was a problem (and request is false), use a JavaScript alert to tell users there was a problem.

The logic for your blog is in a client-side JavaScript script, and security should never be solely enforced on the client.

Scripts written in the JavaScript language can access the public fields and call the public methods of any Java object.

More complicated skin component tags emit JavaScript that contains the values of any specified attributes and then inserts a subform.

If all of the fields have been filled out, a JavaScript pop-up box asks if you would like to upload a picture of this contact.

The JavaScript code (with a little help from the Prototype library) to perform this action might be as follows in Listing 13.

Also, be sure to refer to the JavaScript category here on Nettuts for a massive list of tutorials, at all skill levels.

Since our applet has no UI elements, event information is passed directly to the JavaScript layer.

The last step is to call this sendData JavaScript function from the Flex application.

Felipe Nascimento: I'm a javascript lover and I believe this language will be in the future of most of developers in the word.

Use the Firebug extension to trace which files load slowly, and I bet that your JavaScript files are among the slowest.

Asynchronous JavaScript XML (Ajax) has had a profound impact on the way information can be delivered to a client's browsing session.

Get form data: JavaScript code makes it simple to pull data out of your HTML form and send it to the server.

Get form data: JavaScript code makes it simple to pull data out of your HTML form and send it to the server.

There is no question that Firebug offers a much more natural way of working with JavaScript and that it offers great flexibility.

JavaScript is an incredibly powerful tool, and for too long it was a corruptive force on the web.

Prior to JavaScript libraries, using regular JavaScript, it was still quite easy to find a page element by its ID.

JS Charts is a free lightweight javascript chart generator foundation to support the histogram, pie chart and a simple circular curve.

The same origin policy can be a problem if your JavaScript application wants to contact services that you or others have written.

If you wrap each element in a tag, it will be seen only by users of non-JavaScript user agents: the exact users you want to see them.

Combining JSF with JavaScript to deal with just one component, rather than the entire page, is called immediate event handling.

If you had to parse data like this with server-side Java code or even client-side JavaScript code, you might use DOM APIs.

In the previous section, you learned that you can drastically reduce the size of your JavaScript source files by minifying them.

Simply add some text in the tag to tell users that their browsers don't support JavaScript and that they cannot view the page correctly.

You simply need to call the showDialog or closeDialog JavaScript functions, passing the name of the dialog to show or hide the update panel.

In JavaScript, an object constructor is just a function -- the function's name is the object's name.

It may help to understand what part of your Web application makes heavy use of JavaScript code.

Ajax, however, is just a fancy acronym for the combination of JavaScript and XML.

First, build the comment form as you normally would without any JavaScript code and ensure that it works.

You simply need to call the showUpdatePanel or hideUpdatePanel JavaScript functions, passing the name of the panel to show or hide.

A simple way to control which JavaScript functions may be called through the RPC mechanism is to maintain them in a Set collection.

To see how this work, put the following line in a stand-alone JavaScript file called ticker. js.

But they rely on various other JavaScript globals as well, located within the . . . section of the page.

Other files, like stylesheets, images, or JavaScript, must be transferred to the client as well.

Nothing to it because all the work was already taken care of with the JavaScript functions written in the last section.

Then, the server sends data back to your JavaScript code (still standing in for the Web form) which decides what to do with that data.

The invocation is by means of a JSON-RPC (JavaScript Object Notation-Remote Procedure Call).

Portability problems and inconsistent implementations have also seriously compromised JavaScript as an implementation language.

With JavaScript it is possible to send invalid data to the server even if you do both instantaneous and batch checking.

afterall, if you don't understand prototypal inheritance, the concept of extending inside of JavaScript will seem foreign to you.

Geo-spatial mapping might sound tricky, but not when the Google Maps JavaScript API does so much of the work for you.

After you deploy the Venkman JavaScript debugger, you must set an option to allow you to see the code in the sidebar.

Once the component stub is obtained, executing the method looks like any other JavaScript method call . . . or does it?

In Flex, we create a function to call our external JavaScript function and execute it, changing the status line.

The JSON object includes both the "id" field and the "name" field for the record encoded as a JavaScript hash table.

Having a JSON formatted output improves the ease with which JavaScript components can use the feed output.

When I first experimented with caching the home page, I could have decided to simply replace the links with JavaScript.

Embedded links or JavaScript within the page can report to a central monitoring server on user activity within a web site or portal.

The V4 framework allows for JavaScript to be coded in the usual way, but with a few special constructs.

One of the best JavaScript unit testing frameworks is the JsTestDriver library, which provides testing for JavaScript code across browsers.

Once all of those browsers reach a point of market saturation we'll be able to remove a large chunk of code from most JavaScript libraries.

Then, the JavaScript code tests the length of the entered text and returns an error message if the user input isn't valid.

Our extensive JavaScript code-generating tools range from simple bookmarklets all the way up to our popular Hierarchical DHTML menus.

You can write a simple script in any other language that returns a similar response to test the JavaScript code.

UltraEdit focuses a good deal on web development platforms, with advanced features built-in for HTML, PHP, JavaScript, and much more.

Download this JavaScript library, which contains the scripts above and a simple test page for the scripts.

Use this to see your site through the eyes of a user who doesn't have the luxury of JavaScript available to them.

The next block you need to put in place is the JavaScript API that exposes the methods available to Ext. Direct.

In JavaScript, a namespace is nothing more than an object that holds static properties, static methods, and other nested namespace objects.

The front-end event must then call a JavaScript function with the same name as your PHP class name.

This payload can be simple HTML, but most gadgets contain some kind of JavaScript logic, as well.

Unlike similar JavaScript libraries, jQuery has a unique philosophy that allows you to express common complex code succinctly.

The image annotation gadget is basically just some JavaScript written by a Wikimedia volunteer and made standard on the site.

The cut and paste solution is to move the JavaScript to the bottom of the page.

Second, the logic to call the RPC adapter and construct the page at runtime will be implemented using JavaScript.

When an identifier is encountered, the execution context's scope chain is searched for an identifier with a matching name.

If you need to put JavaScript in your pages, put it into a separate file and include this file in your page.

The last part of the JavaScript implementation is to define the init function that will be called right after the page load.

The JavaScript code is always the same, but the values that are defined in the Answer type are in different languages.

The easiest way by far would be to have access to that information in JavaScript.

When you put the JavaScript code at the bottom, it will (in most cases) download last, after the other components.

Additionally, the JavaScript dojo. parser needs to be included as well.

Until recently, most JavaScript developers had virtually no development tools to help them debug and generally make their life easier.

The other is to respond with data and leave it up to some other JavaScript code to parse the data and repaint.

You, though, are going to use the data table control and a little JavaScript.

It may break for older or uncommon Web browsers, and, of course, it won't work if the user has disabled JavaScript.

Selenium also allows you to use XPath, regular expressions, or even JavaScript to locate specific elements, if you so desire.

JavaScript Object Notation (JSON) is a data interchange format used to represent data in the business logic running on browsers.

Many JavaScript toolkits attempt to anticipate every possible developer need, but jQuery focuses on the basics.

You should also be clear that style and behavior (event handlers and JavaScript) are applied to this organization after the fact.

These are the very limited JavaScript privileges that generally do not let the script access anything but site-related information.

So, when you choose a JavaScript library, you can't go wrong by picking one of these three libraries.

Security issues, JavaScript errors and inexplicable CSS rendering quirks have made it the brunt of many jokes.

You can interact with your Web UI and step through the Java code that represents the corresponding JavaScript executed on the client.

WebSEAL is intelligent enough to filter JavaScript, but you need to tell it to do so.

The JavaScript code in the example application (index. html) records local function invocations into a page level array named cmdHistory.

Some Web sites are built completely with JavaScript code and Ajax -- a practice I recommend that you avoid if at all possible.

iUI also contains compact versions of the CSS and JavaScript files, with extraneous whitespace removed for a quicker download.

The Web server serves the result to the client in the form of an HTML page, AddressBook. html, utilizing JavaScript and CSS in the process.

Listing 22 is a streamlined version (the namespace declarations and a JavaScript function have been removed) of template. xhtml.

Because it strips the HTML tags, the attempt to run a JavaScript fails, and you get a much more appropriate result from the script.

The data is inserted into the currently displayed page through JavaScript DOM manipulations applied to the currently displayed HTML markup.

Clicking the link will bring you to the generated JavaScript source of api. php for the classes and methods defined in config. php.

Since JavaScript code receives the data, the front end doesn't directly see any debugging data sent from the back end.

When a help desk user receives a service request, he fills in the form presented in HTML UI and submits it with a JavaScript action.

Also ignored are synchronized declarations, as the JavaScript interpreter does not support threading.

JavaScript API - The JavaScript API is a simple API that has been optimized to help you emulate the Netflix experience in your application.

Today, even despite its lingering bad reputation, JavaScript is arguably one of the most used (and useful) languages on the planet.

Many JavaScript frameworks come with a myriad of utility functions that make developing applications using JavaScript easier.

Since JavaScript objects have no declared type information, it might seem counterintuitive to formally declare a model.

Your JSON document doesn't contain any markup, just the URLs and metadata for the images your JavaScript code turns into a slide show.

This index. html file contains a few JavaScript functions that get the data from the RESTful Web services and display each task as a link.

When used in a JavaScript function, this refers to the context in which that function is running.

The event is a click, which is handled by an observer (the element), and processed by a handler (the snippet of JavaScript).

We'll need a JavaScript hack to process the upload form, which presents some complications as you'll see.

Place your JavaScript code in . js files if you want to call the same functions in multiple pages.

The Java class is in your client package, meaning that it's intended to be compiled by GWT into JavaScript code.

From this point, the JavaScript component code is connected to the HTML fragment on the page.

The value2date function makes it possible to get the value of any string whose value is an RFC 3339 date as a JavaScript Date.

Most of the JavaScript frameworks available implement some form of support for rapid element selection.

What happens if I dynamically create a script tag in the JavaScript code and add it to the DOM?

To enable all this logic requires less than 200 lines of JavaScript code.

In the previous example, you used a static file (ticker. js) to dynamically insert JavaScript into a Web page.

Many third-party JavaScript libraries are provided in their uncompressed form as well as in a minified version.

Even more importantly, you no longer have to expose all of your code using embedded JavaScript.

DOM Storage provides a simple set of JavaScript variables that are persistent across page loads.

The above is the syntax to call the submit function defined in the widget's JavaScript file.

This fun JavaScript tool can help you pick out the colors you want and help you see how they look together.

Take a look at the Google Trends graph of the four most popular JavaScript libraries below.

Clearly, if there was a scale for type weakness, JavaScript would be the wimpiest of them all!

Current implementations are done with HTML and JavaScript, but "the system is designed to seamlessly integrate into future browsers" .

A JavaScript function that uses Ajax accesses a URL and is capable of doing something with the response.

This usually takes the form of malicious JavaScript, which could do anything from annoying the user to capturing data from cookies.

Most JavaScript frameworks have some form of Ajax object with a request method that accepts a series of options as an argument.

It is typically a JavaScript class defined in one of the resources declared in your XML descriptor (see the next item in this list).

Both of these JSP TagLib controls encapsulate all asynchronous communication, JavaScript code, CSS formatting, and HTML generation.

On the presentation side, and specifically in a web application, some constraints can be applied by JavaScript code.

It turns out that JavaScript internally represents objects as a simple string, which you can easily create and interpret manually.

When the request returns, the appropriate JavaScript callback function is called.

In addition, tag attributes do not have a fixed order like the parameters of a JavaScript function or Java method.

JsonML builds on the basics of JSON and enables you to model the user interface elements using JavaScript notation.

Instead, you'll work with a programming model very similar to desktop or native mobile application development, except in JavaScript.

Within the faces JavaScript object there must be another JavaScript associative array under they key Ajax.

As stated above, any JavaScript instructions embedded within a JSON data block are executed immediately as the data block is interpreted.

The APIs tell you if active content, such as JavaScript, is included in HTTP request parameters based upon a set of filter rules.

You can use this code in combination with the next trick to delay the loading of the JavaScript file entirely.

While this might seem perfectly innocent, the link will not work at all if JavaScript is not enabled.

Another point to consider is how well a method degrades when JavaScript is disabled, unsupported, or not supported well enough.

OK, you've seen how constructor functions and prototype objects allow you to simulate classes in JavaScript.

This led to grotesque practices like automagically injecting javascript that trapped clicks and converted them into state-gathering POSTs.

The string is the location of another JavaScript file that will become the body of the worker.

One of the most compelling reasons to use a JavaScript framework is for standardized cross-browser Ajax requests.

This approach allows you to move the validation JavaScript to a file other than the JSP.

The bulk of the work is done in the JavaScript section at the bottom of the page.

A simpler way is to create a global JavaScript object that relates each enumeration value to its label.

The last JavaScript block with utility functions starts with data handlers, which are needed as parameters for the queries.

Even when robots are more careful, they often do not run any JavaScript on the form page.

With just the JavaScript frameworks we have now, we're pushed in the direction of application development for the client side.

FireBug: Web debugging tool. ". . . absolutely outstanding. . . nothing beats the DOM information and JavaScript debugging. . . "

Because the comparison page requires some form parameters, you must write a bit of custom JavaScript code to render it with ThickBox.

At the top of the file, I include the prototype. js JavaScript file, which will do all the Ajax work for me.

Second, JavaScript bases object construction on a prototype, or an existing instance of an object, rather than a class template.

Let me revise the code in Listing 8 that read XML from the server to read JavaScript data from the server, instead.

The requests are usually asynchronous and made with JavaScript, but the response isn't always XML.

Finally, Java--JavaScript interfaces are used to transfer notifications back and forth from HTML context.

and contributors from around the world, it's an industrial-strength JavaScript library for professionals who love JavaScript.

This article provides information for using JavaScript to create, view, edit, and remove documents in an IBM Lotus Domino application.

Think about exactly what asynchronous means; think about JavaScript code running and not waiting on the server to respond to its requests.

Seam creates JavaScript structures to emulate any JavaBean classes that are used in the method signatures of the server-side components.

This provides a link between server control properties and client properties which can be consumed by Silverlight and JavaScript handlers.

When you try accessing a property or a method of an object, the JavaScript engine looks first among the members of the object.

The user clicks on a radio button to call the following JavaScript function.

Because you're pulling the data into the JavaScript code, you no longer have to display the actual applet on the page.

The generated JavaScript code can be placed within a element of the Web page that calls the generated function as in Listing 3.

In fact, you'll be hard-pressed to do much in the Ajax and JavaScript worlds without using the DOM to at least some degree.

This approach frees the JavaScript from less efficient algorithm implementation as well as providing robust cross-platform key management.

Like Java code, JavaScript does have exception handling, which we recommend using for your error handling.

In Domino Web Access, however, all the item (field) values for a document are available on the page as JavaScript vars.

Also, much of the new functionality can be replicated with JavaScript in browsers that don't yet have support.

The DOM Inspector and JavaScript Debugger extension take a lot of the pain out of Ajax development.

Geronimo's LDAP server is then queried via JavaScript, and a list of suggestions for auto-completion is displayed.

Thanks to built-in Wicket AJAX engine we did not have to write a single block of JavaScript code or manually link a JavaScript library.

To work around this limitation and have rich reflection over JavaScript classes, ASP. NET AJAX requires the names of types to be registered.