IE6 positioning issue - missing placed button image

I have created a page with a "back" button at the bottom right. It looks well positioned in Firefox and more modern browsers however in Internet Explorer 6 the "back" butto开发者_JS百科n is missing.

http://www.aetnamarketingcommunications.com/DentalQuiz/QuizTestPage.html

I have tried adding z-index property to this absolute positioned image button without success...what could be the issue? Thanks, Attila

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To fix this bug, try clearing your absolutely positioned element by adding clear: both to the anchor styling. It's a bug in IE6, and has nothing to do with floats.

IE6 is below 1% usage, not sure why you want to support it.

Special Note About Z-Index (IE): If you're using z-index in IE6-IE8, it should be noted that the stacking order in IE gets reset whenever you apply position: absolute, so the z-index is not relative to any of its parent containers.

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I don't test for ie6 anymore but I would try *zoom:1 ing everything like so

* {
    *zoom: 1;
   }

and narrow it down from there..