Ajax form validation

Packed with numerous examples, Simply JavaScript is a step-by-step introduction to programming in JavaScript the right way. Learn how easy it is to use JavaScript to solve real-world problems, build smarter forms, track user events (such as mouse clicks and key strokes), and design eye-catching animations. Then move into more powerful techniques using the DOM and Ajax. Learn JavaScript's built-in functions, methods, and properties. Easily integrate JavaScript in your web site. Use JavaScript to validate form entries and interact with your users. Understand how to respond to user events.

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No matter what kind of ninja you are—a cooking ninja, a corporate lawyer ninja, or an actual ninja ninja—virtuosity lies in first mastering the basic tools of the trade. Once conquered, it’s then up to the full-fledged ninja to apply that knowledge in creative and inventive ways. In recent times, jQuery has proven itself to be a simple but powerful tool for taming and transforming web pages, bending even the most stubborn and aging browsers to our will. jQuery is a library with two principal purposes: manipulating elements on a web page, and helping out with Ajax requests.

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The World Wide Web officially celebrated its 20th birthday as I began writing this book. In one sense, it’s hard to believe that the technology has been around this long already. At another level, it’s amazing how much has happened in that short time. When I started teaching and writing about the Internet (long before the Web was practical), none of us had any idea what it was going to turn into one day. If you’re reading this book, I don’t have to tell you that the Web is a big deal. It’s come a long way, and it’s doing very interesting things. What I want to show...

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"Computer, draw a robot!" said my young cousin to the first computer he had ever seen. (Since I had instructed it not to listen to strangers, the computer wasn't receptive to this command.) If you're like me, your first thought would be "how silly" or "how funny"—but this is a mistake. Our educated and modeled brains have learned how to work with computers to a certain degree. People are being educated to accommodate computers, to compensate for the lack of ability of computers to understand humans. (On the other hand, humans can't accommodate very well themselves, but that's another story.

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This book begins with you working along as Scott Guthrie builds a complete ASP.NET MVC reference application. He begins NerdDinner by using the File-New Project menu command within Visual Studio to create a new ASP.NET MVC Application. You'll then incrementally add functionality and features.

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Advanced ASP.NET Program PRESENTER: MR. DOAN QUANG MINH Agenda Some addition knowledge Performing Data Access Validating Form Input Control Styles, Themes, Skins MasterPage SiteMap ASPX Life Cycle 10 phases of ASPX Life Cycle ASP.

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WEB2PY AJAX.HTML 265 The "index" action generates the following form: If an invalid form is submitted, the server returns the page with a modified form containing error messages. The error messages are DIVs of class "error", and because of the above web2py ajax code, the errors appears with a slide-down effect: The color of the errors is given in the CSS code in "layout.html". 266 AJAX RECIPES The web2py ajax code prevents you from typing an invalid value in the input field. This is done before and in addition to, not as a substitute for, the server-side validation.

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AJAX Form Validation class="" Please enter a valid date.
E-mail: " / " Invalid e-mail address.
Phone number: " / " Please insert a valid US phone number (xxx-xxx-xxxx).

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4 AJAX Form Validation Validating input data is an essential requirement for quality and secure software applications. In the case of web applications, validation is an even more sensitive area, because your application is widely reachable by many users with varying skill sets and intentions. Validation is not something to play with, because invalid data has the potential to harm the application's functionality, and even corrupt the application's most sensitive area: the database.

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