Hey Christian -
If your goal is to open a different Tableau report which shows info about the Product being clicked on, just do something like this:
The default behavior of Tableau is to open up a different report in a new window via URL Actions.
A third idea: Embed a "Web Page" object directly in the dashboard. Whatever you call on the URL action will get displayed inside the Webpage part, as long as you use the linktarget parameter correctly.
your last post is exactly what I am looking for since quite a while, a kind of pop-up window which calls the pop-up directly. You mention calling the pop-up window directly (here you used http://foo.com/popup.php?ProductID=<ProductID> ) - would you have a real example with code I take a look ?
On another note, you mentioned using the "Web page object" on a dashboard, issue with that is that all action URLs on that dashboard then default open in that object and not in the browser, is there a way to define which URL opens in the browser and which open in the web page object..?
many many thanks !