I use a java script slide show for showing pictures, where the picture changes every 5 seconds.

I have heard that all pictures are immediately loaded each time that I open a page that has pictures.

Will someone please explain if pictures do all load at one time? When I open a page with lots of pictures as I do in my birdhouse page, it still loads very fast and the slide show is immediatly available if I click the slide show button.
I have 44 pictures that are loaded on this page.

Can someone explain to me how picture loading works?

Please check this at my website: www.openoursite.com
Click on "Hobbies" in the left menu and then click on "Birdhouses"

The pictures will load one at a time, consecutively.

The reason you see them all very quickly is because they're already in your cache and you don't need to download them.

Go and use a friend's computer (or any computer that hasn't looked at your site) and try it.

UPDATE:

I have just loaded your site while looking at the networking tab of the taskmanager.

I can see that the pics are loaded on at a time, as they are displayed.

The code you are using does not implement pre-loading

You should be fine