How can I get jQuery to call an event handler when an image actually appears on-screen?

Question

How can I use jQuery to trigger a callback of a JavaScript function when I scroll down and see a picture? I wish to delay loading certain images until they actually appear on-screen... Ideally, I'd be able to do something like:

$('#img#').look_on() { ...

So no images are loaded apart from those I have seen.

Answer 1

I think this JQuery Event Plugin does what you need:

Element 'in view' Event Plugin

I've created an event that will trigger when the element is scrolled in to the viewport.

also, the LazyLoad Plugin seems to have a "viewport" selector for JQuqery: Here .

Answer 2

这有点像我搜索的内容... http://www.appelsiini.net/projects/lazyload