Another very important thing to notice is the nature of HTML and CSS. They are meant to look different in different places. My mobile phone is not able to show your fancy 6 column fixed with javascript based layout. And it should not be able to. Safari and Konqueror decided to not allow certain styles in forms (security and desktop consistency). Large screens will resize your font and that might break your fixed with layout. People using older screens will have larger font sizes set. People with bad internet connections often disable images. Or even CSS.
So keep in mind that your style is nothing more than an advice for browsers to display it in certain ways. It is by no means a law.
