Changing CSS Styles

[BrianH158]

I'm making a site that will be used as a "software" type thing for use with a
Police Department.
The pages have to be able to switch from "day mode" to a "night mode."
ie. in the day the pages should be like white with black text whereas at night
they should be black with red text.

Now my question is.. what is the best way to complete this with out having to
just make everypage twice?
or is it just easier to make each page twice?

[rilkesf]

No need to make every page twice. Create two different CSS stylesheets--one
for the day colors and one for the night.

Then use javascript to create a link that can dynamically switch between
stylesheets.