XMII Applet and Authentication
Hi,
I have a webpage which has an applet embeded on it. I can access this webpage via a browser from the local xmii server and the applet displays correctly. Whenever I try to access it from a remote client I am getting an "Authentication Required" message where the applet should be. The rest of the page is displayed normally. Can anyone help with this.
In the java console I am getting the following exception:
ERROR - Error Loading Resource File for Applet_: access denied (java.util.PropertyPermission http.strictPostRedirect read)
Authenticator::Authentication error is Authentication Required
Thanks,
Mahwish
Hi Mahwish,
I am assuming that you are using an htm or html for you web page extension. Try changing the extension to irpt to force you to log into xMII prior to loading the page. You could also use the URL
http://<server name>/Illuminator/PortalLogin.jsp?target=/dir/page.htm
To force htm or html pages to authenticate please see note 930312
Regards,
Jamie Cawley
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All,
I enabled RoleEntityACL from configuration manager. Role access list field shows up, but when I type **, there are no values at all. Not even guest and authenticated, OOTB values.
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Thanks
~Srinath,
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Hi,
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This is all ok, until sometimes the server stop responding correcly for requests regarding this two pages with the Applet.
When this happens the server just responds with a blank page.
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The IIS log don't show errors.
The eventviewer doesn't show errors.
The problem is solved with an IIS reset or a Application Pool reset.
After a while the problem returns.
This problem occours for other user in another machine, the server just stops responding correcly to request regarding pages with applets, the other pages still continue to work.
If we disable Java Control Panel->Advanced->Java Plug-in->Enable the next-generation Java Plug-in the problem seend to stop, but we can't force all clients to disable this option right?
Or there is a way to force the Applet to run with this option disabled?
As anyone experience similar problem?
Regards,
OFThis is all ok, until sometimes the server stop responding correcly for requests regarding this two pages with the Applet.
When this happens the server just responds with a blank page.
- with fiddler I can seer the request for the aspx page (that uses the applet)
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It could be that server gets into this wrong state because of previous requests made by applet but it is hard to tell.
I am not clear how old/new plugin can make a difference unless your applets run in the legacy mode (i.e. you are actually trying to reuse SAME instance of the applet when
it is loaded next time).
I'd start with
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3) add debug statements to aspx - it is scripted page, may be some condition is not met and then it returns blank?
4) record all http requests in one session until you get to "error" state and then use any http server testing tool to "replay" this set of requests.
You should be able to get server into the same state without use of applet. Then you can try to tweak set of requests to see what makes a difference. -
I need help with Applets and Multithreading
[hello all. first time poster. big fan of java.]
now to the important matter: Applets and Threads
=======================================
1) I have an applet with that implements the runnable interface, and has one thread (and a simple animation). If I try to view this applet in the applet viewer with JGrasp, it spits an insane error telling me
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What on earth is wrong, and how do I fix it?!?
2) I want to put 2 threads in my applet?
If I implement the Runnable interface, I can only have one Run() method in my applet, right?
So how do I define behaviour for 2 threads when I only have one run method in which to define the behaviour? Can I use two threads with the runnable interface, or do I have to make objects of my own defined thread classes?
3) I tried to make 2 threads in my applet by creating my own thread classes, and instantiating them in my applet (instead of implementing the runnable interface).
I still get the same insane error as I mentioned in my first point (which I expected), except now, the applet won't work even when viewed through a web browser!!
Please please help me. I am frustrated beyond belief (at what is probably a very simple problem)
I have searched and searched all over and found no answers on thisIf I try to view this applet in the applet viewer with JGrasp, it spits an insane error telling me
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If I implement the Runnable interface, I can only have one Run() method in my applet, right?Correct
So how do I define behaviour for 2 threads when I only have one run method in which to define the behaviour?
Can I use two threads with the runnable interface, or do I have to make objects of my own defined thread classes?You can create two Runnable implementations (classes) in your applet.
example (missing code)
class MyApplet extends Applet {
void doSomething() {
void doSomethingElse() {
void startThreads() {
Thread t = new Thread(new Runnable() { public void run() { doSomething();}});
t.start();
t = new Thread(new Runnable2());
t.start();
class Runnable2 implements Runnable {
public void run() {
doSomethingElse();
}If the above seems confusing, read up on anonymous and inner classes.
3) I tried to make 2 threads in my applet by creating my own thread classesTry not subclassing thread - this causes a security check -
Socket communication failure between Java applet and C++ application
I have a java applet that connects to a C++ application via Java's ServerSocket and Socket objects. THe C++ application is using the Winsock 2 API. The applet and application are running on an NT workstation (SP 6) and using IE (5.5) For a very simple C++ test applications the communictions work fine. Once more code gets added to the C++ application the portion of the socket that C++ listens to seems to close. Upon performing a recv call the return value is a zero. Microsoft insists this is a sign the Java side has shut down the socket. The Java applet can still receive messages from the C++ app but C++ cannot receive responses from the Java side. Java throws no exceptions and an explicit check of the socket shows no errors. Again, what puzzles me is that it works for simple C++ applications. Are there any known conflicts between Java and C++ in this regard?
I have inlcuded the basic java code segments below.
/ run Method.
* This method is called by the Thread.start() method. This
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* This method sets up the server side socket communication and
* contiuously loops looking for requests from a external
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* @author Chris Duke
public void run(){
// create socket connections
boolean success = false;
try {
cServerSocket = new ServerSocket(cPortID);
System.out.println("Waiting for client to connect...");
cClientSocket = cServerSocket.accept();
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// if the socket was successfully created, keep the thread running
while (success){
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String message = ReceiveMessage();
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if (cInStream == null){
success = false;
System.out.println("CommSocket:Run - shutdown");
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// SendMessage method -
* Sends a text message to a connected listener through port specified by portID
* @author Chris Duke
* @param String message - This will be the message sent out through the server
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System.out.println("SendMessage : Flush - No Error");
}a very simple C++ test applications the communictions work fine. Once more code gets added to the C++ application the portion of the socket that C++ listens to seems to close.
This quite strongly implicates the extra code in the C++ App. The firstly thing I would try would be telnet. Try connecting to both versions of the C++ Application and manually reproducing a proper exchange.
a recv call the return value is a zero. Microsoft insists this is a sign the Java side has shut down the socket.
A correct implementation of recv should return the number of bytes received, or -1 for an error. A zero return indicates no bytes received not a socket closed/error. This sounds like FUD to me.
Are there any known conflicts between Java and C++ in this regard?
I can see no obvious faults, though the code is incomplete, I don't think it's an sockets implementation issue, at either end, it sounds more likely to be a protocol/handshaking bug in the C++ App. -
Security issues with applets and windows Vista when printing to file
Hi, everyone
I am currently developing an application that prints out the result of some calculations.
from a Javascript file, the output finally ends up in a java applet that should print the file in a special printer.
For debugging purposes I have created a File printer that creates a file from the output comming to the printer; this way I can debug what commands the printer is receiving.
This worked well on Windows Xp; Vista always asks for permissions for the applet, and altough I guarantee these permissions, printer is not allowed to create the output file and reports an error writing
after a little research, I have found that java applets have all permissions when certificated as trusted applications; all but file creating permissions
anyone has any idea of how could I fix this problem?
Thanks in advanceHI,
Have you actually signed your applet? If the signers certificate is the trusted key store for Java it should treat your applet as trusted. You can use a self signed certificate for testing as long as the cert is in the trusted key store.
Some links that might help:
[http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/keytool.html]
[http://java.sun.com/j2se/1.4.2/docs/guide/plugin/developer_guide/rsa_signing.html]
Cheers,
Shane -
I'm crazy!Applet and JNA Error:Library 'jnidispatch' was not found!
Hi all,
sorry to bother you, I really have no idea how to do JNA and Applet. I'm hardly mazy, man.
Every time it will throw an error to me :
Exception in thread "thread applet-JNAApplet-1" java.lang.UnsatisfiedLinkError: Library 'jnidispatch' was not found by class loader sun.plugin2.applet.JNLP2ClassLoader@291aff
at com.sun.jna.Native.getWebStartLibraryPath(Native.java:858)
at com.sun.jna.NativeLibrary.<clinit>(NativeLibrary.java:576)
at com.sun.jna.Library$Handler.<init>(Library.java:140)
at com.sun.jna.Native.loadLibrary(Native.java:372)
at com.sun.jna.Native.loadLibrary(Native.java:357)
at JNAApplet.init(JNAApplet.java:15)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)My program is so easy, I just want use Applet to revoke JNA and use the JNA to load a native lib.
here is the structure of my program:
Applet code :
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JPanel;
import com.sun.jna.Native;
public class JNAApplet extends JApplet {
public static Kernel32 kernel32 = null;
@Override
public void init() {
createGUI();
kernel32 = (Kernel32)Native.loadLibrary("Kernel32", Kernel32.class);
if (kernel32 == null) {
System.out.println("load kernel32 fail!");
} else {
System.out.println("load kernel32 success!");
private void createGUI() {
JPanel panelCenter = new JPanel();
JButton butTest = new JButton("Test");
panelCenter.add(butTest);
setContentPane(panelCenter);
}When I run it on debug mode, it is ok! but when I deploy it , it will throw above error message to me.
My Applet html:
<html>
<head>
<title>JNA Applet</title>
</head>
<body>
<script src="deployJava.js"></script>
<script>
var attributes = { code:'JNAApplet', width:300, height:300} ;
var parameters = {jnlp_href: 'JNAApplet.jnlp'} ;
deployJava.runApplet(attributes, parameters, '1.5');
</script>
</body>
</html>File 'JNAApplet.jnlp':
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="" href="">
<information>
<title>JNA Applet</title>
<vendor>Steven</vendor>
</information>
<resources>
<j2se version="1.5+"
href="http://java.sun.com/products/autodl/j2se" />
<jar href="JNAApplet.jar" main="true" />
</resources>
<applet-desc
name="JNA Applet"
main-class="JNAApplet"
width="300"
height="300">
</applet-desc>
<update check="background"/>
</jnlp> I really have no idea. and I can't search any usefull infomation from Google and officer site.
Can any one help me? Thank you very much!!!!Hi AndrewThompson64:
Did you mean the JNA project? Or are you refering to JNI, or ..something else?Yes, I mean is that I wanna jna.jar to replace JNI to code with Applet. I want Applet can run native library(.dll files).
That reads like so much nonsense to me.Sorry fo that.
Was there any 'caused by' part that you trimmed? I expected to see something to do with 'Security' or 'AccessControl'.Sorry, I can't saw any 'cause by' subsentence there. This message is just gain from Applet Console.(Is there any method to gain more message?)
About 'Security' and 'AccessControl' I just modify my java.policy file to allpermission. Subsequently, I signed all jar files.
For now I have 3 jar files(all have been signed ):
--example.jar : for this little program.(code include applet and application entry)
--jna.jar
--win32-x86.jar : include kernel32.dll and jnidispatch.dll for win32 and x86.
and 2 JNLP files:
--JNAApplet.jnlp the entry is JNAApplet.class (this jnlp does not work)
--JNAApp.jnlp the entry is JNAApp.class (this jnlp works)
And for now new error message show like this:
Exception in thread "thread applet-JNAApplet-1" java.lang.UnsatisfiedLinkError: Library 'Kernel32' was not found by class loader sun.plugin2.applet.JNLP2ClassLoader@4aeb52
at com.sun.jna.Native.getWebStartLibraryPath(Native.java:858)
at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:97)
at com.sun.jna.NativeLibrary.getInstance(NativeLibrary.java:228)
at com.sun.jna.Library$Handler.<init>(Library.java:140)
at com.sun.jna.Native.loadLibrary(Native.java:372)
at com.sun.jna.Native.loadLibrary(Native.java:357)
at JNAApplet.init(JNAApplet.java:12)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Did you mean invoke?
Revoke: To annul by withdrawing.
Invoke: To call on.Yes, you got it. Thank you.
The JNLP file is invalid. ..I was about to put my 'standard' text here, but I'm sick of saying it. Search the forum for my posts - 50% of them, at least, mention validation and how to go about it.
Also, the applet-desc requires a documentbase.Thank you, I really think I have some invalid section. But I can't find it, and you said 'Search the forum for my posts - 50% of them...' , I can read the JNLP structure on site of sun and I can to read you post too(I'm doing like this).*I only want to know about how to load "native lib like *.dll" properly*.
What 'officer site'?I mean jna project site. Sorry for ambiguity.
Please fix that sticky '!' key. One '!' indicates astonishment, while two or more typically indicates a bozo. Thanks for your advice. Because I tried to find solution do my best lasting two days. I got nothing. I'm sadness.
here post my new files:
import javax.swing.JFrame;
import com.sun.jna.Native;
public class JNAApp {
public static Kernel32 kernel32 = null;
public static void main(String[] args) {
// TODO Auto-generated method stub
kernel32 = (Kernel32)Native.loadLibrary("Kernel32", Kernel32.class);
JFrame frame = new JFrame();
frame.setSize(500, 500);
frame.setVisible(true);
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JPanel;
import com.sun.jna.Native;
public class JNAApplet extends JApplet {
public static Kernel32 kernel32 = null;
public void init() {
createGUI();
kernel32 = (Kernel32)Native.loadLibrary("Kernel32", Kernel32.class);
private void createGUI() {
JPanel panelCenter = new JPanel();
JButton butTest = new JButton("Test");
panelCenter.add(butTest);
setContentPane(panelCenter);
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="" href="">
<information>
<title>JNA Applet</title>
<vendor>Steven</vendor>
</information>
<resources>
<j2se version="1.5+"
href="http://java.sun.com/products/autodl/j2se" />
<jar href="JNAApplet.jar" main="true"/>
<jar href="jna.jar"/>
</resources>
<resources os="Windows" arch="x86">
<nativelib href="win32-x86.jar"/>
<nativelib href="kernel32.jar"/>
</resources>
<applet-desc
documentBase=""
name = "success"
main-class="JNAApplet" width = "200" height = "200">
</applet-desc>
<update check="background"/>
<security>
<all-permissions/>
</security>
</jnlp>
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase="" href="">
<information>
<title>JNA Applet</title>
<vendor>Steven</vendor>
</information>
<resources>
<j2se version="1.5+"
href="http://java.sun.com/products/autodl/j2se" />
<jar href="JNAApplet.jar" main="true"/>
<jar href="jna.jar"/>
</resources>
<resources os="Windows" arch="x86">
<nativelib href="win32-x86.jar"/>
<nativelib href="kernel32.jar"/>
</resources>
<application-desc
main-class="JNAApp">
</application-desc>
<update check="background"/>
<security>
<all-permissions/>
</security>
</jnlp> Thanks & Best Regards,
Su Heng -
How to access a file via Applet and JavaScript
I want to copy one file on the client machine from one place to another place from a Java Bean.
To do this I created an applet and a Java Bean as follows:
import java.applet.*;
public class FileUtils extends Applet {
public void copyFile(String src, String dest) {
private String source, destination; // setters/getters are there of course
public void copyFile(ActionEvent actionEvent) { // Bean
FacesContext fctx = FacesContext.getCurrentInstance();
ExtendedRenderKitService erks = Service.getRenderKitService(fctx, ExtendedRenderKitService.class);
String command = "var s = '"+ source +"'; var d ='" + destination +"'; " + " document.fileUtilsApplet.copyFile(s, d); ";
erks.addScript(fctx, command);
}Then I added the APPLET tag referencing the above class in the page fragment:
<f:verbatim>
<applet code="FileUtils.class" name="fileUtilsApplet" height="30"
archive="/context-root/Applet.jar"
width="200">
</applet>
</f:verbatim>From the Java console I can see the jar is successfully downloaded, but when the code in the bean is executed, the JavaScript code does not seem to do anything, as if the "copyFile" public method was not called at all and no output in the Java Console as well.
Note that I already followed the guidelines at http://www.oracle.com/technetwork/developer-tools/adf/learnmore/71-adf-to-applet-communication-307672.pdf .
Do you have any ideas?Ok, I can see the permission problem now:
java.security.AccessControlException: access denied (java.io.FilePermission c:\myfile.txt read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
Edited by: user10047839 on 1-feb-2013 7.29
signing the Jar and downloading the certificate permanently does not change anything in Firefox. The Java console keeps giving the above exception.
Any idea? -
Deploy Applet and MySQL - how to read and write
Question on deploying Applet and MySQL
I am building an applet that is to be a part of a simple game. The applet is supposed to read data from a MySQL server and use it to place towns on the map. In addition, the applet must be able to write to the base.
I have build a prototype and ran it in netbeans on my computer. It then successfully read data from a local MySQL base. HOWEVER; when I embed the applet in html code it no longer reads from the base. My method for connecting to the base is
try{
Statement stmt;
ResultSet rs;
Class.forName("com.mysql.jdbc.Driver");
String url=adress;
Connection con=DriverManager.getConnection(url, user, user);
stmt=con.createStatement();
rs=stmt.executeQuery("SELECT * " +
"from "+table+" ORDER BY id");
while(rs.next()){
get data...
Town T=new Town(data...); //construct town object
TL.put(T); //put town objects in an object TownList to use later
con.close();
catch(Exception e){
So;
1) Why wont the applet read anymore?
2) Is there a better way to do this? I have heard that its better to connect applets to servlets in some situations. What demands does this place on the server? Is there software that you need to install on the server to use servlets?I think I do need an applet. The map I have written permits a lot of features that I dont know how to achieve in another way.
1) Zooming in and out on mousewheel
2) Clicking on on two towns gives the distance and by selecting a trooptype one can get information about the traveltime between cities.
3) Right now, I have a feature to find players or groups of players that are of special interest. It allows a player to submit a list of interesting players. The applet reads this list and provides a button with the players name. If one clicks the name of a player, all his cities flash between their originall color and white (using thread).
I need java to do this and I need to run it in a webbrowser because there are som parts of the game that is made up of php. So I assume I have to build it as an applet? -
Help. How do you TAB from HTML component to applet (and back) ?
How can one tab between applets in a browser, and from an applet to an HTML component?
For example, I have the following in my page in decending order:
an HTML text field,
an applet containing two components,
and another HTML text field.
When focus is on the first HTML text field pressing TAB should shift focus to the first component of the applet, the next TAB press shifts focus to the second component of the applet, and the next TAB press shifts focus to the other HTML text field. Then another TAB press cycles back to the first TEXT field.
I can handle the tabbing within the applet using the FocusManager, but how can I get the applet to receive focus on a TAB from the browser, and once the applet has focus, how can I give focus back to the browser when a TAB occurs from my last applet sub-component?
At the moment a user has to click on the applet before he can tab in it, and then click outside it to tab in the html again.
Any help appreciated, as I cant find any reference to how to do this apart from other people asking the same but getting no replies.
Thanks,
MennoI see what you are saying. Either use javascript with LiveConnect or go all applets.
What we are actually doing at the moment is trying to componentise using small applets passing data via InfoBus. So I guess we could use only applets as you suggest. Either with getAppletContext, or we could have a data item on the InfoBus which contains the name of the required in-focus applet, and all applets listen to see if it is their name, and if so request focus.
I'm suprised applets are not tab-able between by default. I would have thought this was a common requirement.
I'll look into LiveConnect as well, and let you know how we get on.
Cheers,
Menno -
Tabbing from applet to applet, HTML component to applet, and back
How can one tab between applets in a browser, and from an applet to an HTML component?
For example, I have the following in my page in decending order:
an HTML text field,
an applet containing two components,
and another HTML text field.
When focus is on the first HTML text field pressing TAB should shift focus to the first component of the applet, the next TAB press shifts focus to the second component of the applet, and the next TAB press shifts focus to the other HTML text field. Then another TAB press cycles back to the first TEXT field.
I can handle the tabbing within the applet using the FocusManager, but how can I get the applet to receive focus on a TAB from the browser, and once the applet has focus, how can give focus back to the browser when a TAB occurs from my last applet sub-component? At the moment a user has to click on the applet before he can tab in it, and then click outside it to tab in the html again.
Any help appreciated, as I cant find any reference to how to do this apart from other people asking the same but getting no replies.
Thanks,
MennoWell, I think it is both a Java & HTML problem.
When you TAB from HTML there must be a way to TAB to the Java applet, and when you TAB from the applet there must be a way, when you are on the last component within the applet, to TAB back to the HTML components.
Anyone know how?
Cheers,
Menno -
Signed applet and HTML parameters
I've created a signed applet and everything works fine, except for the fact that i can't add parameters to the applet.
Without the parameters in the HTML the applet inits and starts and can be used without problems. But when I add paramaters, the applet reports a "class not found exception".
I used HTML-converter to convert the applet tag to object/embed tags.
Has anyone had the same problem or knows what I'm doing wrong? I'd really appreciate some help.
Thanks in advance,
Erik
My HTML source:
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = "600" HEIGHT = "400" codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,0,0">
<PARAM NAME = CODE VALUE = "TNA" >
<PARAM NAME = ARCHIVE VALUE = "TNA.jar" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3.0">
<PARAM NAME="scriptable" VALUE="false">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.3.0" CODE = "TNA" ARCHIVE = "tna.jar" WIDTH = "600" HEIGHT = "400" scriptable=false pluginspage="http://java.sun.com/products/plugin/1.3/plugin-install.html"><NOEMBED></COMMENT>
</NOEMBED></EMBED>
</OBJECT>
<!--
<APPLET CODE = "TNA" ARCHIVE = "tna.jar" WIDTH = "600" HEIGHT = "400">
</APPLET>
-->Try this:
OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = "600" HEIGHT = "400" codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,0,0">
<PARAM NAME = "java_code" VALUE = "TNA.class" >
<PARAM NAME = "java_archive" VALUE = "TNA.jar" >
<PARAM NAME = "java_type" VALUE="application/x-java-applet;version=1.3.1">
<PARAM NAME="scriptable" VALUE="false">
<COMMENT>
<EMBED type="application/x-java-applet;version=1.3.0" CODE = "TNA" ARCHIVE = "tna.jar" WIDTH = "600" HEIGHT = "400" scriptable=false pluginspage="http://java.sun.com/products/plugin/1.3/plugin-install.html"><NOEMBED></COMMENT>
</NOEMBED></EMBED>
</OBJECT>
<!--
<APPLET CODE = "TNA" ARCHIVE = "tna.jar" WIDTH = "600" HEIGHT = "400">
</APPLET>
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