This test invokes a Java method from JavaScript. Clicking on any of the 3 buttons above will bring up a dialog box. Choose a File. On Clicking "Ok" it will be subject to current Security settings in Security Preferences. under 'Applets and JavaScript'. Read File will display contents of file in text box. Write File will write current contents in text area into a file. Delete File will delete the file selected.
If it is set to 'Restricted', then it wont be able to perform any of the operations mentioned above. If set to 'Ask First' a dialog should popup, asking users permission for performing these actions. If set to 'Blocked' then applet will not be displayed (see Console).
Note: Settings in 'Special Cases' screen, will override these settings.