Slide image galleries (counting script)

I’m using a script that is adding an image gallery automatically (it creates thumbnails of bigger images). But when I have a large amount of images, the page is to full. Is there a way to split them up in pages?

I think of some script that slides in the pages. Found this already, but there is some crucial function missing. I need also some code that counts the ammount of ‘li’ lines. Example: when it detects more than 20 (say 25) ‘li’ lines (images), it generates a new div so there are two divs (one with 20 and one with 5). Is this possible to do? I don’t have the programming skills to achieve this. Can someone help me with this?

Or is there some other script that does this easily?

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