Thank You for Your answer.
Does Your answer mean that gallery SimpleViewer has no function even in source actionscript files for stopping the download of ALL images at the moment when the gallery is loaded?
I have found a solution to stop cache which works well for the whole HTML pages of my website except with the gallery which loads the images before they are shown.
I want the gallery to download the images directly from the server at the moment of viewing/click. For example, I open the gallery, the small images (thumbnails) and the 1st big one are shown (downloaded), then I want to view for example the 6th image, so I click on the 6th thumbnail and the 6th big image starts to download from the server (NOT from the downloaded in advance all images at the moment of first opening of the gallery as it happens NOW).
Thanks in advance.