Why mobile websites are different from regular websites?
Nowadays days, many mobile users take the help of their cell phones for surfing the internet.
http://www.squidoo.com/mobile-web-browser

There is no space to display all the things at a time to that small screen. Infact real desktop system faces many browser problems on displaying webpage in different sizes. The contents that you have to view in desktop will not exactly matched to the mobile compatabilty. It shows image, text, mp3 and video stuff in a compressed way. Thats why we have different view in mobile browser when compare to desktop browser.