anchor for resolution problem

Hi. I use the x_treme motiv. now i have a little problemwith the diffrent monitor resolutions.
How can i set an anchor in the picture gallery?
It means,i look with my laptop (1280x800)on my galley and at some of the pictures i must scoll down, so i have it complete on the screen. when i go to the next, the scollbar jump up to the top and i must try this again. how can i made it, that the scollbar is on the next picture on the same place as bevore (that i have all the pics complete on my screen)? with higher resolutions (1600x and more) it works logically. i have read in this forum someone made it with an anchor but he has no written how...

like this: http://www.hdg-singen.de/galerie/main.php?g2_itemId=14763