Suppose you have a 100 html pages in your website, you need to showup the pages with the same color combination and background etc. So you keep all such things in a css file, and refer to that file from all your 100 html files. Hence if you need to change a background color of some part, you dont have to visit all the 100 html pages, instead change a single css file, thats it.
Jan 11, 2010