Animating your layers
Dynamic HTML, or DHTML, refers to the combination of HTML with a scripting language
that allows you to change style or positioning properties of HTML elements.
Timelines, in , use dynamic HTML to change the properties of layers
and images over time. Use timelines to create animations that do not require
any ActiveX controls, plug-ins, or Java applets (but do require JavaScript).
Note: The word dynamic can mean different things in different web-related contexts. Don’t confuse Dynamic HTML with the idea of a dynamic web page, which means a web page generated dynamically by server-side code before being served to a visitor. For more information about creating dynamic pages, see The Workflow for Dynamic Page Design.
Timelines allow you to change the position, size, visibility, and stacking order of a layer. (The layer functions of timelines work only in 4.0 or later browsers.) Timelines are also useful for other actions that you want to occur after a page loads. For example, timelines can change the source file of an image tag so different images appear in the page over time.
To see the JavaScript code generated by a timeline, open the Document window’s Code view. The timeline code is in the MM_initTimelines function, inside a script tag in the head section of the document.
When editing the HTML of a document containing timelines, make sure you do not move, rename, or delete anything that a timeline refers to.
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