open modal auto top scroll at the first time

[IcebergRage]

My photo wall is at the end of the page. (after 3/4 block) so when a user click on a picture, the modal open at the top (scroll top). when the user close the modal, he has to scroll back to the photowall.

Then, if he want to display the modal again, the modal open at the good position (when the user clicks).

Do you have any idea to disable the first scroll top ?