Redirecting to a website?

Say someone goes to my website, how can i redirect them to a different site? like say my site is under construction, so i want to point it to a back up?

This will also break out of any frames that are active as well:

Code:

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<SCRIPT language="Javascript">
window.parent.parent.location.href='http://www.wherever.com';
</SCRIPT>

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This will also work:

Code:

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<META Http-equiv="refresh" Content="3; Url=http://forums.vb-world.net">

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