How do I get this script working?

I am working on a simple web app.

http://domgarofalo.com/austin/#home

I can't get the math function to work correctly.

Can someone help please?

Thank you.
domgarofaloAsked:
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Brian TaoSenior Business Solutions ConsultantCommented:
At line #23, 24 and 25 (and maybe others), you tried to declare variables using "double" which does not exist in javascript.  In javascript you declare variables (of all types) with "var".
Please let us know if you still got problem after you change them.
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Brian TaoSenior Business Solutions ConsultantCommented:
Thanks for the points.
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