MACROMEDIA DREAMWEAVER MX 2004-EXTENDING DREAMWEAVER Spezifikationen PDF herunterladen (Seite 128)

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128 The Dreamweaver Document Object Model

Which document DOM?

It is important to distinguish between the DOM of the user’s document and the DOM of the

extension. The information in this chapter applies to both types of Dreamweaver documents,

but the way that you reference each DOM is different.

If you are familiar with JavaScript in browsers, you can reference objects in the active

document by writing

document. (for example, document.forms[0]), the same way that you

reference objects in extension files. To reference objects in the user’s document, however, you

must call

dw.getDocumentDOM(), dw.createDocument(), or another function that returns a

user document object.

For example, to refer to the first image in the active document, you can write

dw.getDocumentDOM().images[0]. You can also store the document object in a variable and

use that variable in future references, as shown in the following example:

var dom = dw.getDocumentDOM(); //get the dom of the current document

var firstImg = dom.images[0];

firstImg.src = “myImages.gif”;

This kind of notation is common in files throughout the Configuration folder, especially in

command files. For more information about the

dw.getDocumentDOM() method, see the

dreamweaver.getDocumentDOM() function in the Dreamweaver API Reference.

The Dreamweaver DOM

The Dreamweaver DOM contains a subset of objects, properties, and methods from the

World Wide Web Consortium (W3C) (www.w3.org/TR/REC-DOM-Level-1/) DOM Level

1, which are combined with some properties of the Microsoft Internet Explorer 4.0 DOM.

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