How do i get a website to change its dimensions depending on what the users monitor resolution is? So i could have the page fill the browser window from resolutions from 640*480 up to 1280*1024?

Many thanks.

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When torrents of tears flood down your face,
When you're feeling low and life's a disgrace,
Looks back to the good old days of life,
Before you make the slit with the cold silver knife,
When life has no meaning and you don't want to stay,
Remember my friends, it's better to burn out then to fade away...