JavaScript Phrasebook: Essential Code and Commands by Christian Wenz

By Christian Wenz

Builders are hungry for a concise, easy-to-use reference that places crucial code "phrases" at their fingertips. JavaScript, and the comparable AJAX, is sizzling and there's little to no info on the right way to use JavaScript to improve AJAX-based purposes. whereas there are lots of JavaScript books out there, such a lot of them are dated and few disguise the newest advancements, similar to AJAX. JavaScript Phrasebook is the advisor to JavaScript and AJAX that you should and may take with you in all places. Skipping the standard educational on JavaScript and introducing AJAX as one of many first released works at the subject, the JavaScript Phrasebook is going immediately to sensible JavaScript and AJAX instruments, offering instantly appropriate recommendations for common projects and code so versatile that it really is simply tailored to the your personal wishes.

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4 shows the result: When the mouse pointer is moved over the element, two event handlers are called. 4. The JavaScript code gets executed. [View full size image] 47 48 Note The main advantage of this approach lies in the fact that the JavaScript code completely resides in external files and is not cluttering the HTML markup of the page. From an architectural point of view, this is quite a bright ideaand it works cross-browser. cursor = "help"; Every operating system comes with a certain set of mouse cursors, and CSS supports a subset of them.

Html) uses this as the return value for a link, so if No is clicked, the link is not followed. Warning Note that this dialog is translated by browsers, so you should avoid text like "Click Yes to…" since users with a non-English system do not have a Yes button. 2). This information is the return value of the method call and can be further used in the script. 2. prompt(). prompt() returns null. The preceding code checks that; if the OK button is pressed, the data entered is shown. Chapter 3. Images and Animations In the early days of the Web, one of the first effects done with JavaScript was image manipulation.

1 shows. This is extremely convenient when you're debugging. 1. Mozilla browsers (here: Firefox) complain about invalid CSS values. className = "strong"; The most commonly used way to apply CSS to an HTML page is by using classes. With JavaScript, the class for every element can be accessed with the className property. weak { font-weight: lighter; }

CSS and JavaScript

The preceding code changes the class for the text every second. disabled = true; When a page consists of more than one style sheet (