Only in Jalbum I can do multiple galleries at once,
That is correct. Only the Juicebox skin for jAlbum allows you to create multiple galleries at once
... but Facebook share option not working....
I have just created a test album in jAlbum and the Facebook sharing seems to work fine for me.
However, as I noted previously, due to the fact that the browser never leaves the 'index.html' page (and galleries are switched using JavaScript), there can be only one og:image for the entire album (and you need to add this manually by editing your 'index.html' file manually in a plain text editor).
There is a Pro Options field in Jalbum, but probably it is not working with shareUrl="www.example.net/test"
That's right. The shareUrl configuration option is used only by JuiceboxBuilder-Pro (and not the Juicebox skin for jAlbum). However, adding an og:image to your album's 'index.html' should take less than a minute and, due to the way that the album works, only one og:image can be used anyway so it is not a long time-consuming task.
Even if the Juicebox skin for jAlbum used shareUrl, the entire structure of the skin's output would need to be changed to allow a different og:image for each gallery. Each gallery would need to be displayed on its own separate web page and the visitor would need to go back and forth between the galleries and the navigation tree page (unless the navigation tree was duplicated on every gallery page but, again, this would require a huge restructuring of the skin).
If you find that, even after adding an og:image to your album's 'index.html' page, the designated thumbnail does not show up in the Facebook share window, then try running your album's 'index.html' page URL through Facebook's online tools to refresh Facebook's own cache of the page's Open Graph information.
(1) Facebook's Sharing Debugger: https://developers.facebook.com/tools/debug/sharing/
(2) Facebook's Batch Invalidator: https://developers.facebook.com/tools/d … ing/batch/
(3) Facebook's Open Graph Object Debugger: https://developers.facebook.com/tools/debug/og/object/
(Click the 'Fetch new scrape information' button.)
If you continue to experience difficulties, please post the URL to your album's 'index.html' page so that I can take a look and hopefully help further. Thank you.