So what is going on here?

This is an exercise using Ajax, php, javascript and css sprites.

what exactly is going on?

1. There is a server request that gets the date from a php script.
2. The date is returned with commas separating it into 3 values.
3. Using javascript, this is split into an array.
4. Conditional statements are applied (switch() statement) - based on the day/ month/ year to select correct background-position for the day, month, year, div background-image.
5. A css sprite is set up that uses one image and background-position
6. Coordinates are selected that reveal the correct part of the image that corresponds with the current date.

The whole point?

reduce number of server requests.