Alternate CSS styles

Hi
I’m having a problem trying to set-up an alternate css stylesheet.
I’m adding the following code to the index.php file, since all the pages are created using it as a starting point. The problem is that I can select the alternate css (using firefox) and the current page is changes to the appropiate style, but as soon as I click on another page, it goes to the default style. It is not remembering my previous choice.
First attempt:
<style rel=”Default Style” type=”text/css” media=”screen”>
@import url( <?php echo get_settings(‘siteurl’); ?>/wp-layout.css );
</style>
<style rel=”Alternative” type=”text/css” media=”screen”>
@import url( <?php echo get_settings(‘siteurl’); ?>/alternative.css );
</style>
Seccond Attemp:
<link rel=”Default Stylesheet” title=”Default” href=”
<?php echo get_settings(‘siteurl’); ?>/wp-layout.css”>
<link rel=”Alternate Stylesheet” title=”Alternate” href=”
<?php echo get_settings(‘siteurl’); ?>/alternative.css”>
Both didn’t work, I have read several documents postings about css, checked the file type that my apache server is sending the right type css/text, etc…, also files from w3c about this, and the seccond option is supposed to worked, but no solution yet.
Thanks in advance for any advice.