Double check that Java scripts has not been disabled. It is turned on by default but it is easy to turn it off while messing around and looking at the menu items
click Tools:Options:Download Controlsthen make sure the box next to Execute Java Applets is checkmarked
it was checkmarked.
if that is not helpful
SB is a GUI replacement for the the Trident engine that is installed and called Internet Explorer on you computer. This means that some of the Internet Options set for Internet Explorer will be used by and affect your use of Slimbrowser.
So run Internet Explorer and browse to your bank and see if IE will run the Java script. If not then you need to adjust your IE settings to allow it to run. Those are found in Internet Options.
No java in IE as well - which setting should I change there..?
if that is not helpful
You may need to download the latest version of java appropriate for your system.
Already done.
So while running Slimbrowser navigate to the Java webpage and use the Java website feature which selects the download for you by using your browser and system info sent to their website. Install the recommended download.
http://java.com/en/download/index.jsp