The portion of JET 3270 which runs inside the user's
web browser is known as a JavaTM applet. The applet is a set
of class files. Class files are the compiled Java
code. These class files are provided with the JET 3270
distribution as a "Cabinet" file
(JET32704.cab)
and as JAR archives
(JET3270E.jar and JET3270J.jar).
The cabinet files are used by Microsoft
Internet Explorer and the JAR
archives are used by Netscape Communicator
(JET3270E.jar)
and Java Compatible browswers (JET3270J.jar).
To include a JET 3270 applet in a web page, the web
page needs to include an <APPLET> tag that
specifies
CODE=JET3270.class.
In addition you need
to specify
ARCHIVE=JET3270E.jar or
ARCHIVE=JET3270J.jar - depending on the
intended browser - and
specify a "cabbase" parameter set to
"JET32704.cab" (see below for an
example). If the intended browser is Netscape
Communicator use JET3270E.jar and if it is a
Java Compatible browswer use JET3270J.jar.
The applet also needs a space on the screen into
which it can draw. This is specified by the WIDTH=
and HEIGHT= attributes of the <APPLET> tag. A
simple HTML web page example follows:
Note that the text "Your Web
Browser..." will only appear in browsers that
are not Java-enabled, or which have their Java
support currently disabled. A user must have a
Java-enabled web browser such as Microsoft's
Internet Explorer 5 or
Netscape Communicator 4.5
and must have support for Java programs currently
turned on.
There are several web page editors that will
allow you to insert a reference to an applet
without the web page designer being aware of the
HTML commands that the editor generates. It is
equally valid for the web page designer to use
such an editor so long as the CODE, ARCHIVE,
WIDTH and HEIGHT attributes and the
"cabbase" parameter are set
correctly. Note also that class file names are
case sensitive.
Although there are many other class files for the
JET 3270 applet stored in the
JET32704.cab, JET3270E.jar and
JET3270J.jar files,
the web page designer need not specify these in
the <APPLET> tag. The web browser will
automatically identify the other class files that
the JET 3270 applet needs.
When the web browser receives the <APPLET>
tag, it automatically requests that the web
server transfer the appropriate cabinet file (in
this case JET32704.cab) or JAR
archive (in this case
JET3270E.jar
or JET3270J.jar), and begins executing
JET 3270.
Applets can be "configured" by including
parameters embedded in the <APPLET>
tag. The web page designer can include parameters
using <PARAM> tags. Refer to Applet Parameters for
more information.
Preferences are organised into a number of groups. For each group the
preferences can come from either those the user selects on the Change
Preference Set window or the web page used to load JET 3270.
Preferences coming from the web page are applet parameters.
Applet parameters are specified with <PARAM> tags enclosed by the
<APPLET> and </APPLET> tags. An example of an <APPLET>
tag which loads
JET 3270 and supplies two parameters, port and cursor_type, is:
| NAME |
VALUE type |
Default Value |
Description |
| alarm_audio |
File name |
bell.au |
Audio clip file
that JET 3270 plays when it sounds an alarm |
| audio_enabled |
yes, no |
yes |
Whether JET 3270
attempts to sound any alarms |
| auto_scale_font |
yes, no |
no |
Whether JET 3270
automatically chooses the largest font that
can completely fit a full screen within the
window size given to JET |
| auto_scale_print_font |
yes, no |
yes |
Whether JET 3270
automatically chooses the font size used for printing
screen images |
|
background_colour |
Colour |
black |
Colour of main
terminal screen background |
| charset |
One of:
--IBM037
--IBM273
--IBM277
--IBM278
|
IBM037 |
IBM code page
used to interpret data received from TN3270
server |
| cursor_colour |
Colour |
white |
Colour of
cursor |
| cursor_type |
One of:
--underline_no_blink
--underline_blink
--block_no_blink
--block_blink
|
block_no_blink |
Type of cursor
display in normal mode |
| cache_logon_script |
yes, no |
no |
Use the
browser's cache when loading the logon script |
| colour0 |
Colour |
black |
Colour with 3270
colour identification X'F0' |
| colour1 |
Colour |
blue |
Colour with 3270
colour identification X'F1' |
| colour2 |
Colour |
red |
Colour with 3270
colour identification X'F2' |
| colour3 |
Colour |
pink |
Colour with 3270
colour identification X'F3' |
| colour4 |
Colour |
green |
Default colour
and colour with 3270 colour identification
X'F4' |
| colour5 |
Colour |
cyan |
Colour with 3270
colour identification X'F5' |
| colour6 |
Colour |
yellow |
Colour with 3270
colour identification X'F6' |
| colour7 |
Colour |
white |
Colour with 3270
colour identification X'F7' |
| debug |
yes, no |
no |
Provide debugging
& tracing information |
| default_colour |
Colour |
green |
Colour of text with
default foreground colour in normal intensity fields
in extended colour mode |
| default_intensified_colour |
Colour |
white |
Colour of text with
default foreground colour in intensified fields
in extended colour mode |
| disable_connect |
yes, no |
no |
Disable the user's ability
to specify a host to connect to. |
| disable_new_window |
yes, no |
no |
Disable the user's ability
to create new JET 3270 windows. |
| help_source |
One of:
--code_base
--platypus
--custom |
code_base |
Location from which
help files are loaded |
| help_custom_url |
HTTP URL |
(no default) |
URL of location from
which help files are loaded if "help_source" is "custom". |
| host |
free text (host
name or IP address) |
Web server from
which JET 3270 was loaded |
Default host name
to which JET 3270 will connect |
| insert_cursor_type |
One of:
--underline_no_blink
--underline_blink
--block_no_blink
--block_blink
|
underline_no_blink |
Type of cursor
display in insert mode. |
| intensified_protected_colour |
Colour |
white |
Colour of text
in intensitfied, protected fields
in base colour mode |
| intensified_unprotected_colour |
Colour |
red |
Colour of text
in intensified, unprotected fields
in base colour mode |
| key_activity_timeout
|
Integer |
0 |
Minutes JET
3270 waits before disconnecting due to no key
activity. |
| key_for_3270_key_name
|
Text, space
separated list of Input Events |
See
Default Keyboard
Mapping for defaults |
List of Input
Events that map to the 3270 key |
| lu_resource |
Text |
(empty) |
LU resource name
requested when JET 3270 connects |
| last_script_key |
Integer |
0 |
Index of the last
script_key_n applet parameter |
| logon_script_url |
URL or
empty |
(empty) |
URL of script which
is run immediately after connecting |
| port |
Integer |
23 |
TCP/IP port
number of TN3270 server program |
| print_font |
Font |
Monospaced-plain-9 or Courier-plain-9 |
The name, style and point size
of the font used when printing screen images when auto_scale_print is no |
| prompt_host |
yes, no |
yes |
Whether JET 3270
when automatically initiating a connection prompts the user
to enter a hostname and port. |
| normal_protected_colour |
Colour |
blue |
Colour of text
in normal intensity, protected fields
in base colour mode |
| normal_unprotected_colour |
Colour |
green |
Colour of text
in normal intensity, unprotected fields
in base colour mode |
| screen_font |
Font |
Monospaced-plain-12 or Courier-plain-12 |
The style and point size
of the font used on the terminal screen. |
| screen_keyboard |
One of:
--all
--misc |
misc |
Which keys are in the
screen keyboard |
| screen_keyboard_font |
Font |
SansSerif-plain-8 |
The font name,
style and piont size of the font used on the
screen keyboard |
| script_key_n |
Text,
space seperated URL and list of input events |
(no
default) |
URL of a script
and a list of the input events that map to it |
| selection_colour |
Colour |
lightGray |
Colour for
selected text during copy and cut
operations |
| show_keyboard |
yes, no |
yes |
Whether JET 3270
shows the on-screen keyboard |
| show_statusbar |
yes, no |
yes |
Whether JET 3270
shows the status bar |
| show_toolbar |
yes, no |
yes |
Whether JET 3270
shows the toolbar |
| start_connection |
yes, no |
yes |
Whether JET 3270
will automatically initiate a connection to the host
when it first starts and when a new terminal window is
created. |
| start_new_window |
yes, no |
yes |
Whether JET 3270
will automatically create a new terminal
emulator window when it first starts. |
| terminal_type |
One of:
--IBM-3278-2-E
--IBM-3278-3-E
--IBM-3278-4-E
--IBM-3278-5-E
|
IBM-3278-2-E |
Preferred
terminal type |
| toolbar_size |
One of:
--small
--large
|
small |
Toolbar icon
size |
For information regarding allowed values for parameters
that require colour values, refer to Colour Values.
If a parameter name is not specified correctly, or its
value is invalid, JET 3270 uses the default value for that
parameter.
