Transparency is not possible in Fullscreen mode.
You can set a background color for Fullscreen mode whilst keeping the transparency in Normal mode by using the bgcolor Flash Param as below:
<!--START SIMPLEVIEWER EMBED.-->
<script type="text/javascript" src="svcore/js/simpleviewer.js"></script>
<script type="text/javascript">
var params={};
params.bgcolor="ffffff";
simpleviewer.ready(function () {
simpleviewer.load("sv-container", "100%", "100%", "transparent", true, null, params);
});
</script>
<div id="sv-container"></div>
<!-- END SIMPLEVIEWER EMBED -->
... changing 'ffffff' above to the hex color value of your choice.
Steven Speirs
SimpleViewer Support Team