NAME¶
wml::des::rollover - RollOver-Style Image-Button
SYNOPSIS¶
#use wml::des::rollover
<rollover [attributes]>
DESCRIPTION¶
One of the most interesting trick to make a webpage more interactive is the
so-called rollover effect commonly known from window system GUIs. The
idea is simply to change the underlaying image when the mouse rolls
over it. Additionally when a mouse click occurs over the image it acts
like a button and jumps to a new URL.
Although there are more then one way to achieve this optical
effect, to use the client-side scripting-language JavaScript
currently is the best solution. But here only those variants can be used
which provide the "image" object. Netscape
version 3 and 4 and Internet Explorer 4 support this. But the generated code
of this "<rollover>" tag is
backward-compatible with all types of browsers.
ATTRIBUTES¶
- name
- The name of the image. Just for internal usage to bind the correct image
objects to the image tag.
- src
- The normal image which is displayed when the mouse is not over the
image.
- oversrc
- The image which is displayed when the mouse is over the image.
- href
- The URL for the hyperlink which gets activated when the mouse clicks into
the image.
- alt
- This string is displayed in text-only browsers or browsers which have
images disabled at the place where the image stays. Additionally it is
displayed in the browsers status line when the mouse is over the
image.
- target
- This sets the "target" attribute for the
surrounding anchor ("<a>") tag.
Use this for redirecting the hyperlink to different target area, i.e.
usually when using frames or multiple windows.
- :a:ATTR=STR :img:ATTR=STR
- The ``ATTR=STR'' pairs are passed along to the
"<a>" and
"<img>" HTML tags.
AUTHOR¶
Ralf S. Engelschall
rse@engelschall.com
www.engelschall.com
REQUIRES¶
Internal: P1, P2
External: JavaScript (BROWSER)
