The actual problem is that the images do appear in the slideshow, but just nog preloaded, cause they still load from top to bottom, instead of just in an instance.
The preload script should fix that, but it doesn't, so the error must be in this code I think:
var imageObject = new Image();
for(i=0; i<totalamount; i++ )
imageObject.src = "images/slideshow2/"+galleryarray[i];
most common mistake is the wrong URL, but that seems to be correct.
but since I am a newbe, I can't recognize the wrong thing here. Off course the code is lent from several website. Just glued together by me.
Hope I have been more specific now.
thanks, best Sam