HOWTO: Long ListView wirh thumbnail delay loading ?

HOWTO: Long ListView wirh thumbnail delay loading ?

Hello,

I need a help.
I have a long ListView with thumbnail icons.
Like this - http://jquerymobile.com/demos/1.1.1/docs/lists/lists-thumbnails.html

How do I tweak the system so the, at 1st only the items which are being shown on the screen, those thumbnail will be loaded. Then if the user scrolls down, more thumbnail images will be loaded.
that is as the user scrolls down, the images will be loaded.

Same thing happens in Facebook Timeline. Try to see the old posts....

I don't know how to do this easily ?