SAP Event Management document flow
as Steffen wrote, JNet requires a Java Runtime Environment (JRE) of version 1.4.2 or higher and the Java PlugIn must be enabled for the respective browser.
There are also some notes which may are interesting for you:
– 1014150 Configuring the Cache for Java Applets
– 1001854 Problems with older Versions of the Java Plug-In
– 685182 JNet does not work in the BSP extension graphics
– 1452876 icf/set_HTTPonly_flag_on_cookies: Influence on JNet/JGantt