Bedienungsanleitung Adobe DREAMWEAVER CS5.5 (Seite 124 von 661) (Englisch)

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USING DREAMWEAVER

Creating pages with CSS

Last updated 3/28/2012

The style (which comes from a rule, or a collection of rules) resides in a place separate from the actual text it’s

formatting—usually in an external style sheet, or in the head portion of an HTML document. Thus, one rule for

tags can apply to many tags at once (and in the case of external style sheets, the rule can apply to many tags at once on

many different pages). In this way, CSS provides extremely easy update capability. When you update a CSS rule in one

place, the formatting of all the elements that use the defined style are automatically updated to the new style.

You can define the following types of styles in Dreamweaver:

• Class styles let you apply style properties to any element or elements on the page.

• HTML tag styles redefine the formatting for a particular tag, such as h1. When you create or change a CSS style for

the

h1 tag, all text formatted with the h1 tag is immediately updated.

• Advanced styles redefine the formatting for a particular combination of elements, or for other selector forms as

allowed by CSS (for example, the selector

td h2 applies whenever an h2 header appears inside a table cell.)

Advanced styles can also redefine the formatting for tags that contain a specific

id attribute (for example, the styles

defined by

#myStyle apply to all tags that contain the attribute-value pair id="myStyle").

CSS rules can reside in the following locations:

External CSS style sheets Collections of CSS rules stored in a separate, external CSS (.css) file (not an HTML file). This

file is linked to one or more pages in a website using a link or an @import rule in the head section of a document.

Internal (or embedded) CSS style sheets Collections of CSS rules included in a style tag in the head portion of an

HTML document.

Inline styles Defined within specific instances of tags throughout an HTML document. (Using Inline styles is not

recommended.)

Dreamweaver recognizes styles defined in existing documents as long as they conform to CSS style guidelines.

Dreamweaver also renders most applied styles directly in Design view. (Previewing the document in a browser

window, however, gives you the most accurate “live” rendering of the page.) Some CSS styles are rendered differently

in Microsoft Internet Explorer, Netscape, Opera, Apple Safari, or other browsers, and some are not currently

supported by any browser.

To display the O’Reilly CSS reference guide included with Dreamweaver, select Help > Reference and select O’Reilly

CSS Reference from the pop-up menu in the Reference panel.

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