@Jonathan Vanherpe (T & T NV) Yes, some demotivational posters are son funny (some others ... not recommended). Well. Following your comment, I decided to disable right click on the div. I will use JQUERY RIGHT-CLICK PLUGIN (http:// abeautifulsite.net/notebook/68) and try to avoid the context menu for "Save as..".
@all It's definetively a bad experience and as I said before, I know that "protecting" content for being downloaded is really not as efficient as anyone wants. Only with pressing "Print Screen" you have your image to be copied. Although this images are on an intranet, and we dont want do add a watermark, because it will make unreadable some documents (some are very, very old and pigmented). Positionate the gif is a little more complicated, that disabling context menus. Thanks to all.