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The flash movie (above) has been invoked in windowless mode by setting the wmode
parameter to "transparent" in the param and embed
tags of the object element for the flash movie. This prevents
the flash movie from obscuring the popup for the supported browsers if they have a
reasonably current version of flash. We also import
overlibmws_iframe.js to use an iframe shim (as opposed to iframe content) for some browsers and platforms which do not
support the wmode setting. The popup is MODAL, and we use the
HIDEBYIDALL command for the applet and QuickTime movie to hide those
two objects when the document is in the MODAL state (see below). The
MODAL state automatically hides select boxes for any older browser versions which handle
them as system controls, so there is no need to include the
HIDESELECTBOXES command for any of the MODAL popups in this document.
The applet (above) uses java (not javascript) which does not support
wmode settings, as is also the case for QuickTime movies, such as the
QuickTime Virtual Reality (QTVR) movie (above). The iframe shim via
overlibmws_iframe.js would prevent obscuring of popups by applets or
QuickTime movies for IE v5.5 or higher. However, the popups associated with the
applet and QuickTime movie, like that for the flash (see above), are MODAL,
and neither applets nor QuickTime movies are blocked by the associated MODAL shield for
browsers other than IE v5.5 or higher. We therefore use the HIDEBYIDALL
command to hide the applet and QuickTime move for all four of the MODAL popups.
Note that including so many embedded objects in the same document can be excessively
taxing with some browsers. For example, with IE the applet can become vulnerable to
smearing if the document is scrolled quickly, and with Firefox the applet and QuickTime
movie may become slow to hide or display when the MODAL block is being initiated or
terminated. Also note that the imposition of a bullet cursor by the QuickTime Virtual
Reality movie when the mouse overlies it can bleed through the MODAL block and any overlying
popup, but the movie nonetheless is prevented from panning its scene if a click and drag
operation is attempted over the area of the underlying, blocked and hidden movie.
Furthermore, all four of the MODAL popups have been invoked with the
DRAGGABLE command included, and though you can see competition for the
cursor style if a popup is dragged over that area, the dragging is restricted to the popup.
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