Trust Logo javascript popup window behind other content

The Trust Logo pops up a window when you hover over it. The javascript that opens this window specifies a long list of css style attributes. z-index is not one of them, but it needs to be, just like the corner of trust logo uses. The problem I have is that the javascript pop-up window that appears when you hover over the trust logo ends up being behind the other content on my site, making it impossible to see. The corner of trust logo does not have this issue due to its use of the z-index property. The trust logo should work the same way.