It looks like your <iframe> is originating from a Joomla wrapper.
You can add the allowtransparency="true" attribute to the wrapper's default settings by editing the Joomla file 'Joomla_Folder/modules/mod_wrapper/tmpl/default.php'.
Open the file in a plain text editor and change the code:
<iframe <?php echo $load; ?>
id="blockrandom"
name="<?php echo $target ?>"
src="<?php echo $url; ?>"
width="<?php echo $width ?>"
height="<?php echo $height ?>"
scrolling="<?php echo $scroll ?>"
class="wrapper<?php echo $moduleclass_sfx ?>" >
<?php echo JText::_('MOD_WRAPPER_NO_IFRAMES'); ?>
</iframe>
... to:
<iframe <?php echo $load; ?>
allowtransparency="true"
id="blockrandom"
name="<?php echo $target ?>"
src="<?php echo $url; ?>"
width="<?php echo $width ?>"
height="<?php echo $height ?>"
scrolling="<?php echo $scroll ?>"
class="wrapper<?php echo $moduleclass_sfx ?>" >
<?php echo JText::_('MOD_WRAPPER_NO_IFRAMES'); ?>
</iframe>
Now reupload the file to the correct location (overwriting the existing file).
Steven Speirs
SimpleViewer Support Team