On the net anything goes...
Websites built with older technologies can be viewed with next generation browsers, and new web applications should also function in the older browsers . Frontpage 2007, and other failed technologies have led to file/folder pruning and additions of semantic xml content. It is suggested that html coding, css, javascript, and other text files conform to their respective specifications. For more information...
Client satisfaction is the most important part of my job. Working closely throughout the development process, we can build the type of experience that you envision.
It is now possible to create specification based web apps to suite any platform. The new features are supported by most of the new browsers. The advantages are many, and the weaknesses few.
There are few things that the new HTML5 library cannot pull off.
While waiting for IE10 to catchup to the pack, please install chrome frame while using IE9. Its a way for code-cross-browser harmony. Never before could the same code be viewed by all current browsers, and it forced applications to require many hacks for IE. This is the last one that will ever be needed.