HTML5, CSS3, JS - Simple Background Slideshow.

   Note 1: See page source.
   Note 2: Have a look at the page in all browsers.
   Note 3: Try resizing the window to see the effect.
   Note 4: jQuery is not used, unpacked JavaScript source code size is less than 1kb.
   Note 5: All pictures demod have different sizes and are automatically resized and can be dynamically rescalled.
   Note 6: You can change transparency - see RGBA background-color style in the "div#myContainer".