>> Mouse over, expand site to full?

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Trying to create what I believe would be a simple transition. What I want is for a page to load as just asmall button, when the mouse rolls over I want the website to expand to its full size. The problem I’ve incurred is being able to convert thewhole page to a button, but in doing so limit the properties of the page so that I cant have seperate links etc inside of the site. What the hell am I looking over? I’m sure its something farely simple…