Load max image from folder, what is happend?

[btvwebmaster]

Dear friends, I have download cute file Broswer, it is so cool. I love it. But one more, If I have max files on folder, what is effect to server? I mean that, is it slow loading or faster. Can you make load more button ? example, I have 1000 images on ABC folder, and when image is load from ABC folder, I want images to load 50 images first time , Then show more button , when we click on more button, It will show more 50 images with not refresh page, It will show image till 1000 image if we still click more button.

Thanks