Overlapping Window html/css

I have a div containing an image. I want to place another div on top of the first div with instructions and a dismiss button. It must not be an alert window. It must scroll and remain in the same place if the parent window is resized. I know how to dismiss the top window. I have tried style position=relative: messes the rest of form, absolute: goes bad when resize window.
wagazubAsked:
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Gurvinder Pal SinghCommented:
PagodNaUtakCommented:
Sample page?
wagazubAuthor Commented:
Found the answer

<div style="position:relative;">

      <a ...... /> </a>

<div id="helper"  
        style="  position:absolute; left:50px; top:50px; width:300px;
</div>
</div>

Now the contained window is relative to the container. Jeez. Who would have known.

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wagazubAuthor Commented:
css is a bit opaque. Found this solution after searching and messing about for n hours.

See http://www.barelyfitz.com/screencast/html-training/css/positioning/
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