jQuery Image Slider and z-index?

I'm attempting to get the following site to work:

The "Test" logo appears properly before the jQuery slider transitions to the next picture, which is when it gets shoved behind the new slide. I've tried changing the z-in开发者_如何学Godex on a lot of the elements, but nothing seems to work at all. What can I do to fix this?

The slider I'm using is Nivo: http://nivo.dev7studios.com/

Give a z-index of 100 or above to div#logo:

#header #logo{
    z-index: 100
}

It works on the div but not on the image because z-index only works for positioned elements. I.e. elements that have position relative, absolute, etc.