Jquery first fiddle

Here is a very, very short Jquery introduction on Jsfiddle.

After a while the document ready function becomes boring. However there is a shorthand version:

$(function() {
    // ... your code ...

The image registration point

On at JavaScript canvas the registration point is the top left corner.

So in hit detection you have to calculate the x-position, the image width and height. In layout you should be able to figure out where to plage the images, and illustrations.

  • Y = “up / down”
  • X = “left / right”

( I tend to forget this … )

The image registration point.
The image registration point.