Simply have a look at this article. You will not regret the time you have spent here.  

There is an opinion that a nonstandard visual style of interface is a sign of frivolous or light application. Anyway, it is designed for household use but not for business. The nonstandard visual style is the enemy of productivity. This statement is represented like an axiom. But is it so indeed?

I’d like to mention at once that I am not a Web 2.0 fan. Mostly because no one knows what this term means. I am not against social networks and I entirely support AJAX though. But I do not understand who needs this Web 2.0 just maybe in order of making fool of venture investors. However whether we like it or not, this term has already entered our lives and our customers are asking us to create in Web 2.0 Design Style.

So, dear sitebuilders, tell me, how many types of design do you know? And? So, I hear on the right yell hard... Right! What else? flexible... So! And which is better? Ouch! It is not necessary so to yell... Let us find out. Let us give definitions, to have no disagreements. Hard design- tabular design, in which the size of every cell either is set in pixels or by the picture or other element, placed in this cell. Rubber design - tabular design, in which the width of one or a few cells is set in percents from the width of window