Quirks & Strict Mode - New CSS option

The new browsers can use the two mode Quirks & Strict Mode to understand your CSS.

In other words, all browsers needed two modes: quirks mode for the old rules, strict mode for the standard. IE Mac was the first browser to implement the two modes, and IE Windows 6, Mozilla, Safari, and Opera followed suit. IE 5 Windows, as well as older browsers like Netscape 4, are permanently locked in quirks mode.

Choosing which mode to use requires a trigger, and this trigger was found in ’doctype switching’. According to the standards, any (X)HTML document should have a doctype which tells the world at large which flavour of (X)HTML the document is using.

And the best option is using doctype XHTML 1.0 Transitional, it also triggers almost strict mode in all browsers.
Nothing but the option we use for DOM functionality or the HTTP request - but I am looking forward for the entire functionality of HTML5 and How it will work for us.

Waiting for more reading in recent Days