Posted 18 June 2011 - 09:11 AM
css (cascading style sheets), used in conjunction with Html docs.
(What form does the header take, is it an htm/html file.
You would normally have an html file containing a link to the stylesheet, (.css file) and you would open the html file in your browser).
You can certainly open css files in Notepad, or other text editor and your browser, (or in web development applications).
My HTML knowledge is limited, bordering on novice level, but basically:
css defines how HTML elements are to be displayed.
Styles are normally saved in external .css files. External style sheets allow you to change the appearance and layout of pages on a Web site, by editing one file.
If you have any tricky questions, there will be members who can assist.