how to apply jquery lazy loading for second set of images?

I am using this jquery's lazy loader plugin to lazy load bunch of thumbnails. What will happen if I apply lazy loader to smaller thumbnail images first, and then dynamically change those smaller thumbnail images to something larger by changing src开发者_如何转开发 attribute of img.

I want to implement this zoom in/zoom out feature to thumbnail images, how do u make this lazy loading work for those larger image which will load after initial smaller ones ?