Yes, lots of ways. Did you look at the site I sent to you? How are you currently displaying them?
If you are pulling them from a directory listing of a folder, then, you could just skip a random number of pictures. Usually, if they are inside one folder, you could create an array of the filenames and use PHP random function to select one randomly. If you want to make sure that all of the pictures are shown, you would have to create a second array that is marked as they are shown. (If the random number of the picture is selected, you would have to check to see if it was shown already.) This can be an issue as you show more and more pictures. Lots of ways to do this. But, without more info on how you are doing it now, we can not help. So, to help you, we need to know where these pictures are. In a database? In a folder? Do you have them numbered in some way or just filenames? You already are showing them as you said, sliding them into place. But, we don’t know how you are doing this. So, help us help you…