appletviewer can't load file with an absolute path

Appletviewer can't run when using absolute file path. detail:

          # which appletviewer
          /usr/jdk1.3.1beta/bin/appletviewer
          # pwd
          /usr/jdk1.3.1beta/demo/applets/Clock
          # ls -l
          total 32
          -rw-rw-r-- 1 root other 4894 12 12 20:33 Clock2.class
          -r--r--r-- 1 root other 8306 12 12 20:33 Clock2.java
          -r--r--r-- 1 root other 1469 12 12 20:33 example1.html
          # appletviewer /usr/jdk1.3.1beta/demo/applets/Clock/example1.html
           /usr/jdk1.3.1beta/demo/applets/Clock/usr/jdk1.3.1beta/demo/applets/Clock/example1.html
          (No such file or directory) I/O
          # appletviewer example1.html
          (run successful)
          # appletviewer ../../applets/Clock/example1.html
          (run successful)
           Appletviewer can't run when using absolute file path. detail:

          # which appletviewer
          /usr/jdk1.3.1beta/bin/appletviewer
          # pwd
          /usr/jdk1.3.1beta/demo/applets/Clock
          # ls -l
          total 32
          -rw-rw-r-- 1 root other 4894 12 12 20:33 Clock2.class
          -r--r--r-- 1 root other 8306 12 12 20:33 Clock2.java
          -r--r--r-- 1 root other 1469 12 12 20:33 example1.html
          # appletviewer /usr/jdk1.3.1beta/demo/applets/Clock/example1.html
           /usr/jdk1.3.1beta/demo/applets/Clock/usr/jdk1.3.1beta/demo/applets/Clock/example1.html
          (No such file or directory) I/O exception.
          # appletviewer example1.html
          (run successful)
          # appletviewer ../../applets/Clock/example1.html
          (run successful)