Download Ajax in Oracle JDeveloper by Deepak Vohra PDF

By Deepak Vohra

ISBN-10: 3540775951

ISBN-13: 9783540775959

ISBN-10: 354077596X

ISBN-13: 9783540775966

Asynchronous JavaScript and XML (Ajax) is an internet method used to move information among a browser and server asynchronously with no posting the net web page to the server. "Asynchronously" means that the processing of the internet web page keeps whereas the Ajax request is distributed to the server and a reaction is acquired from the server. the net web page, or section(s) of the internet web page, is refreshed with the Ajax reaction with no reposting the internet web page. Ajax has the subsequent merits over non-Ajax internet applications.

- diminished reaction time and lowered server load, because the entire web content isn't reposted.

- diminished bandwidth of internet functions as simply info is transferred and the HTML structure is utilized within the browser.

- Separation of information, structure and elegance.

The publication covers internet seek and RSS Feed with Ajax in addition to shape validation with Ajax frameworks for Java, JSP, JSF, and Hypertext Preprocessor. It discusses utilizing Ajax in Oracle JDeveloper and is IDE established. JDeveloper has the next benefits over Eclipse IDE.

- JDeveloper 11g presents an built-in JavaScript Editor for Ajax/Web improvement.

- It additionally offers a Hypertext Preprocessor extension.

- JDeveloper has a integrated help for JSF and for JDBC.

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Example text

We shall discuss the main Prototype functions and classes next. getElementById() function. For example a nonprototype JavaScript retrieves a form element formDiv as follows. getElementById(“formDiv”); The formDiv element may be retrieved with prototype as follows. 2 $F() function The $F()function is used to retrieve the value of a form element. For example, a non-prototype JavaScript obtains a form field value as follows. value; The $F() function reduces the code to retrieve the form filed value as shown below.

The callback method is invoked when the request state changes and when the request is complete the HTTP response is processed. Request class to send an XMLHttpRequest request. Define a variable for servlet url and a variable for url parameters. Request object with the servlet url. Set the options property method to ‘get’. Specify the parameters options property and set the asynchronous property to true. Specify the callback method with the onComplete property. The XMLHttpRequest gets created and sent to the specified url.

1. Create a XMLHttpRequest object. 2. Open a XMLHttpRequest request. 3. Register a callback method to be invoked when the request is complete. 4. Send a XMLHttpRequest request. 5. Process the XML response and set HTML page content. An XMLHttpRequest request is initiated from an HTML form that has input fields for creating a catalog entry. The XMLHttpRequest is initiated from the Catalog Id field, which is required to be validated. A JavaScript function, validateCatalogId() is invoked with onkeyup event.

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Ajax in Oracle JDeveloper by Deepak Vohra

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