Is it possible to have a permanent image set on top of a slideshow

Here is the slideshow element.

<div id="slideshow">

            <img src="<?echo $image1; ?>" alt="" class="active" />
            <img src="<?echo $image2; ?>" alt="" class="active" />
            <img src="<?echo $image3; ?>" alt="" class="active" />
            <img src="<?echo $image4; ?>" alt="" class="active" />
            <img src="<?echo $image5; ?>" alt="" class="active" />

 </div>

I want to add in a <div id="business_logo"> that sits on top of this JS slideshow. Is there something I can do with z-index? Or is that redeundant when it comes to the slideshow...

The idea being that sit is a logo for a company sitting on top of a slideshow of their company images...