Ajax For Dummies by Steve Holzner

By Steve Holzner

Ajax is brief for “Asynchronous JavaScript+CSS+DOM+XMLHttpRequest.”

Even if you happen to weren’t intimidated ahead of, that tidbit is maybe sufficient to make you achieve for the Excedrin. simply succeed in for Ajax For Dummies in its place. With reveal photographs, real code and reasons, and dwell sites the place you will see Ajax functions doing their factor, it is going to have you ever utilizing Ajax to create net functions that glance an act like computing device functions very quickly. With Ajax, you could accelerate and freshen up your internet functions. consumers at your on-line shop can fill their carts with out looking ahead to a number of web page refreshes. Searchers in your websites can get immediate effects at the similar page.

This advisor takes you on a travel of ways Ajax is used at the present time, entire with examples of Ajax functions in motion, comparable to an Ajax-enabled Yahoo! seek or an Ajax-based chat program. Then it promises fundamentals on utilizing JavaScript. After that you just dive in and get details on:

  • Writing a few Ajax, interactive mouseovers utilizing Ajax, passing info to the server with GET or submit, and more
  • Connecting to Google for a stay search
  • Using unfastened Ajax frameworks so that you don’t need to commence from scratch, together with Ajax Gold (written in particular for this book), AJAXLib, and grabbing XML with libXmlRequest
  • All sorts of Ajax concepts, similar to utilizing Ajax for drag-and-drop operations, pop-up menus, downloading pictures backstage, and more
  • Using SACK (simple AJAX code kit), deciphering XML with Sarissa, and developing visible results with Rico
  • Handling XML int Ajax Applications
  • Working with cascading variety sheets (CCS) in Ajax, together with establishing the types, showing a menu, styling textual content, dealing with shades and backgrounds, and more
  • Working with Ajax and PHP

Complete with a better half site, unfastened Ajax frameworks, and pattern code you should use, Ajax for Dummies is your pleasant advisor to making actually straightforward net sites!

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Sample text

Onabort Occurs when the user aborts an action onblur Occurs when an element loses the input focus onchange Occurs when data in a control, such as a text field, changes onclick Occurs when the user clicks an element ondblclick Occurs when the user double-clicks an element ondragdrop Occurs when the user drags and drops an element onerror Occurs when there’s been a JavaScript error onfocus Occurs when an element gets the focus onkeydown Occurs when the user presses down on a key onkeypress Occurs when the user presses a key onkeyup Occurs when the user releases a key onload Occurs when the page loads onmousedown Occurs when the user presses down a mouse button onmousemove Occurs when the user moves the mouse onmouseout Occurs when the user moves the cursor away from an element onmouseover Occurs when the user moves the cursor over an element onmouseup Occurs when the user releases a mouse button onreset Occurs when the user clicks a Reset button onresize Occurs when the user resizes an element or page onsubmit Occurs when the user clicks a Submit button onunload Occurs when the browser unloads a page and moves to another page Chapter 2: It’s All About JavaScript Putting browser events to work To make any of the browser events in Table 2-1 happen, you need to drop them in a Web page’s HTML.

To avoid that, you can enclose the text you assign to a property in single quotation marks. bgcolor=’pink’; Dividing and Conquering: JavaScript Functions When you use Ajax techniques, you often want to place text in a Web page at a specific location after fetching that text from the server. Making that happen correctly will address a couple of important JavaScript issues. To make text appear is specific place, you need to make your JavaScript run only when you want it to run. To do that, you can place that code into a JavaScript function.

Body> You can see this in action in Figure 2-12, where the is doing its thing. Figure 2-12: Writing to a

element by using a function.

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