CSS - Sending Variables To Css

How do you get the text to bottom of a blank page regardless of the browsers size? valign only works for the position of a single row and margin does not work very well as if the browser is to small it will not display and if to large it will appear to high. I am wanting to use this on an intro type of page.

Also is there a way to display a new html page containing text from a frame link with a transparent background so as to keep the prior background "fixed" in view with the text on top of that?

I want to build a style switcher for my site, to allow users to change color schemes, font sizes, etc. But I hate duplicating data, and having all those style sheets that are basically identical except for the color styles worries me. Is there some way that I could set the colors to variables (ie, $dark, $medium, $light) and then use the variables to define the styles? That way I could stay with just one style sheet.

Any ideas?

Thanks,
Daniel

I'm doing a site, but I'm trying to make it as modular as possible, so that when someone buys it I can change everything on the site in a very short time. I'm using CSS because its fantastic, and it makes my life a lot easier. My question is:

Can I define a variable in the HTML of a site and have the CSS objects on the page behave differently as a result. For example:

If I put in the variable, say:

<%pagecolour%="FF0000">

Can I then have the CSS in my style.css sheet say something like:
Code:

a:visited{
	color: %pagecolour%;
	text-decoration: none;
	border-bottom: 1px dotted #6699CC;
}

and have it fill in the colour on-the-fly.

It would mean that I can change the colours of the colour coded parts of the site (the text, table borders, etc.) in one easy step, and that'd be fantastic!

Thanks in advance for any help.

Hello people

I know it can be done with PHP but here goes anyway :

.dude {color: #F43435 };

.dude2 {background-color: ******};

Is there a way to refer to .dude.color ???
Something like :

.dude2 {
background-color: .dude.color;
}

What I am trying to get is the functionality of defining a "constant" colour which then can apply to the multitude of other CSS classes I have...

Any ideas?

Thanks in advance,
Angelos