[Testing Environment]
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030131
Linux freekick.PRC.Sun.COM 2.4.18-14 #1 Wed Sep 4 13:35:50 EDT 2002 i686 i686
i386 GNU/Linux
Java(TM) Plug-in 1.4.1_01-b01, File name: libjavaplugin_oji.so, Java(TM)
Plug-in1.4.1_01

[Repro Steps]
Access the following testing URL http://sceri.prc/desktop/Browser/QA/Test_Case/java/bugs/bugzilla/172250/case.html

[Bug]
Browser HANG;