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)

SEE ALSO

       HTML 3.2 "<img>" and "<a>" tags, JavaScript:
       http://home.netscape.com/eng/mozilla/3.0/handbook/javascript/