UniBrows provides the ability to run multiple web applications in the same browser, even when they require different versions of the same ActiveX control. A common scenario involves the Java Runtime Engine (JRE). Using the UniBrows Profiles feature, you can bind the desired version of the JRE and load multiple versions of the JRE side-by-side in the same browser.
We have posted a Support Article explaining how to do this: Loading custom versions of Java with UniBrows.