So many online users that still mourn over the lack of Flash scripts on their phone devices, but they wish not to sacrifice loads of time on the websites they surf. A key that includes main effects and seems to be in line to return Flash is Parallax Scrolling.
The Parallax Design is an optical method that originated in the video game business of the 1980′s and now is spreading like a visual choice to Adobe Flash and scripts.
This web design method consists in the plan of various layers stirring at various speeds across the display creating an attractive visual effect that simulates a mood of depth. The effect is a website filled in a single vertical layout. The transition from one section to another section is performed by scrolling with fast actions. By scrolling a sequence of photos that simulates action is focused and you get a surprising visual effect.
We can utilize Parallax website throughout a mixture of CSS3 and JavaScript / JQuery plug-ins like Spritely. Its use can be relegated to the backdrop, as a header / footer or the base of the webpage itself, the possibilities depends on the web designer’s imagination.
These are several of the needs for this effect:

• CSS - Containers with relative positions
• CSS - Using absolute positioning
• CSS - Using z-index floating objects
• PNG images with transparent backgrounds
• Images using sprites
• JavaScript to recognize scroll position

Even though it is a apparently easy method and it creates amazing outputs, you require to apply it with care and excellence to acquire the desired effect, or else the effort can be ineffective.