Getting applets to work in Firefox or IE7!!

Hi folks.
I've been reading Jason Hunters excellet book on Java Servlet Programming and become rather stuck on being able to get applets to work in a browser.
1) I managed to briefly get an Applet to work in IE7. Then things went astray (I say work, because applet initially displayed correctly graphically)
2) I introduced a bug and tried to redisplay. And haven't been able to recover.
3) When 2) occurred I swapped over to Firefox, since IE7 doesn't have a Java Console. (& theres no setting to enable it in security settings either)
4) Then Firefox prompted to download JRE... This was an odd one to me.... Since I already had a Java runtime...
I got this through downloading file java_app_platform_sdk-5_04-windows.exe
java -version yeilds:
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\Jeremy>java -version
java version "1.6.0_04"
Java(TM) SE Runtime Environment (build 1.6.0_04-b12)
Java HotSpot(TM) Client VM (build 10.0-b19, mixed mode)
C:\Documents and Settings\Jeremy>
Browser Versions
IE : is at version 7.0.5730.13
Firefox started out at 2.0.0.12... Now Firefox didn't seem to detect the JRE
5) It said additional plugins are required to display the media on this page...
6) I clicked the button to "Install missing plugins"
It then presents Plugin Finder Service with "Available Plugin Downloads" of Java Runtime Environment with checkbox ticked.
7) I clicked "next", at which point it completes saying
No plugins were installed
Java Runtime Environment failed with "Manual Install" button...
Clicking said button gave me executeable xpiinstall.exe from http://sdlc-esd.sun.com
8) When I ran this it
a) proceeded to cause Firefox to crash and a report was sent to Mozilla...
b) created a restore point called "Installed Java (TM) 6 update 5..
9)So now I went back to IE 7 having given up on Firefox...
Now it complained about missing classes which I felt sure were in a jar I'd deployed in Tomcat...
10) I tried to validate my assumptions by looking inside the Jar with Winzip...
Then I got a pop up with "Java Virtual Machine Launcher" in its title saying..
"Failed to load Main-Class manifest attribute from cos.jar"
At this point I realised 8) was the culprit after posting here and looking at possible causes for said pop-up.
[http://www.artima.com/forums/flat.jsp?forum=1&thread=61427&start=75&msRange=15]
None of solutions posted there seemed to apply to me
11) So now I restored to a restore point prior to 8) and though my problems were over
12) I've since upgraded to Firefox 2.0.0.14. Firefox pushed update to me. Also tried manually uninstalling and downloading file. Still saying missing plugin!!!
13) I've tried changing my tags in my html from
APPLET to OBJECT for IE7 or EMBED for Firefox..
I've validated my APPLET with APPLETVIEWER following advice posted here:
[http://java.sun.com/docs/books/tutorial/deployment/applet/index.html]
No tell tale signs appear in Tomcat Console or logs..
*The only thing that seems weird is codebase tag*
14) Book I've been reading mentioned putting both html code and applet class in root folder of tomcat
I've hosted both files here:
C:\Apps\apache-tomcat-6.0.16\webapps\ROOT
15) When I test with appletviewer from this folder and codebase set to / appletviewer doesn't find class.
I think I need to set this so when web browser runs it finds class. Maybe this is the route of my problems.
What's haunting me here though is placeholder for applet graphic worked at one point!
I don't recall fussing with codebase attribute of applet tag, yet suddenly things stopped working.
16) When I tried to verify with appletviewer I had to remove codebase attribute completely to get things to work.
Here are three versions of html file. Firefox version doesn't seem to be recognized by Appletviewer
Applet tag version: (BTW have tried with CODEBASE=/ too. This was how it appeared in book, Remember I'm hosting in Tomcat 6.0.16)
{code}
<HTML>
<HEAD><TITLE>Daytime Applet</TITLE></HEAD>
<BODY>
<CENTER><H1>Daytime Applet</H1></CENTER>
<CENTER><APPLET CODE="DaytimeApplet.class" WIDTH=300 HEIGHT=180></APPLET></CENTER>
</BODY></HTML>
{code}
IE Version only
{code}
<HTML>
<HEAD><TITLE>Daytime Applet</TITLE></HEAD>
<BODY>
<CENTER><H1>Daytime Applet</H1></CENTER>
<CENTER><object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
width="300" height="180">
<param name="code" value="DaytimeApplet.class"></object></CENTER>
</BODY></HTML>
{code}
Firefox version with JRE matching what java -version says precisely and using "jpi-version" so need for download instructions url 'should' be redundant..
{code}
<HTML>
<HEAD><TITLE>Daytime Applet</TITLE></HEAD>
<BODY>
<CENTER><H1>Daytime Applet</H1></CENTER>
<CENTER>
<embed code="DaytimeApplet.class"
width="300" height="180"
type="application/x-java-applet;jpi-version=1.6.0_04"/>
</CENTER>
</BODY></HTML>
{code}
I don't want to be staring at a placeholder in a Web Browser.
I want to GUI as it appears in AppletViewer and how it once had it working in IE7!
You wouldn' t think that was to much to ask for would you! Sorry for length of this post.
Any clues as to where to go next would be greatly appreciated as I'm pulling hairs out with frustration at the moment...
A few of footnotes:
1) I've relaxed my security zone settings for intranet, added localhost to local intranet sites..
2) I've tried deleting all temporay files in IE7 even to point of resetting to install setup thinking there may be some sort of caching issue with bad applet... No luck
3) I can still get Glassfish server to login to Admin Console.
So the integrity of my pc should me intact based on the shenanigans of point 11. Restoring to get rid of second JRE

paulcw wrote:
I'm not sure what to tell you. I've never had any trouble installing the JRE and getting applets to work. Maybe it's an IE7 thing. Firefox is usually easier to configure.
Anyway, it sounds like something that you need to be sitting at your computer to fix, so I don't know how useful a forum will be. It might be best just to ask a coworker with a lot of arcane knowledge to take a look at it.1) Unfortunately I'm learning from home and don't have the luxury of asking a co-worker. Have fired off email to one of folks at Sun..
In my efforts to try and track down the problem yesterday, Google uncovered some interesting findings regarding Caching of Applets. Thought I'd share this:
2) [http://www.velocityreviews.com/forums/t603400-ltobjectgt-tag-and-applet-caching.html]
There is an interesting post some way down posted by james.a.cleland
Quote:
"My solution is to x-c in the Java console to clear
this cache. This works without unloading the JVM and while the applet
is running. It looks like the browser isn't caching any applets. At
least my browser cache doesn't contain any, although I do regularly
use half a dozen, so it must be the JRE. Anyway, clearing through the
console solves my problem".
I can't access Java Console in IE7 as you know...
3) There is always another way to skin a cat regarding clearing cache.
Found this here:
[http://www.aurigma.com/Support/DocViewer/28/UpdatingImageUploaderonClientSide.htm.aspx]
Search for Java section
Quote:
"Java applets are stored in the cache that is accessible through the Java control panel. Follow these steps to do it:
Open Java Plug-in Control Panel. Depending on the platform, it can be found in different locations:
Windows: Control Panel -> Java Plug-in
Click the Cache tab.
Click Clear to clear all cached applets."
*Problem is that there is no Java Plug-In within Control panel. Mentioned this with Coffee Cup reference above..*
4) Also saw this article on *"How to troubleshoot Java applet and component download problems"* at:
[http://support.microsoft.com/kb/241111]
Java console or output log section:
Javalog.txt in the windows\java or winnt\java directory
windows\java contains
- classes
- trustdb
No such file: classes & trustdb are empty folders.
5) I have same problem mentioned here:
[http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=915520&SiteID=1]
Quote:
"I cannot get java applets to display on any web pages - instead this message appears:
alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason." Your browser is completely ignoring the <APPLET> tag! "
Yep. That's my predicament.
BTW: Get this by doing test here:
[http://java.sun.com/products/plugin/1.5.0/demos/applets/Clock/example1.html]
6) Sun's Verify Installation fails on me too:
[http://www.java.com/en/download/installed.jsp]
7) I'm interested in knowing how IE7 caches the applets too. Does it store some sort of class-id in the registry? (I'm on XP SP2)
8) Is there an installation integrity verifier for Sun? Something that verifies the integrity against a baseline install and reports anomalies.Like I mentioned earlier I've got java_app_platform_sdk-5_04-windows.exe file installed. Not the latest incarnation, but the one immediately before. With SE 1.6.0_04-b12 built built into it

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<code>
// Java Programming - CSCI-267
// Assignment for week # 13
// Filename AutoDatabase
// Written by Mike 'siece' Gilmore
// Written on Nov. 23 2k3
import java.sql.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
public class AutoDatabase extends Frame implements ItemListener, ActionListener{
Connection conEmployees;
Statement cmdEmployees;
ResultSet rsEmployees;
boolean blnSuccessfulOpen = false;
Choice lstVehicle = new Choice();
TextField txtInvID = new TextField(10);
TextField txtMan = new TextField(10);
TextField txtModName = new TextField(9);
TextField txtYear = new TextField(14);
TextField txtVID = new TextField(14);
TextField txtCost = new TextField(14);
Button btnAdd = new Button("Add");
Button btnEdit = new Button("Edit");
Button btnCancel = new Button("Cancel");
Button btnDelete = new Button("Delete");
Label lblMessage = new Label(" ");
public static void main(String args[])
AutoDatabase thisApp = new AutoDatabase();
thisApp.createInterface();
public void createInterface()
loadDatabase();
if(blnSuccessfulOpen)
setTitle("Java Class Week 13 Assingment");
addWindowListener(new WindowAdapter()
public void windowClosing(WindowEvent event)
stop();
System.exit(0);
setLayout(new BorderLayout());
Panel pnlTop = new Panel(new GridLayout(2,2,10,10));
pnlTop.add(new Label("Inventory ID"));
lstVehicle.insert("Select a Vehicle to Display", 0);
lstVehicle.addItemListener(this);
pnlTop.add(lstVehicle);
pnlTop.add(new Label(" "));
add(pnlTop, "North");
Panel pnlMiddle = new Panel(new GridLayout(7,2,10,10));
pnlMiddle.getInsets();
pnlMiddle.add(new Label("Inventory ID"));
pnlMiddle.add(txtInvID);
pnlMiddle.add(new Label("Manufacturer"));
pnlMiddle.add(txtMan);
pnlMiddle.add(new Label("Model Name"));
pnlMiddle.add(txtModName);
pnlMiddle.add(new Label("Year"));
pnlMiddle.add(txtYear);
pnlMiddle.add(new Label("Vehicle ID"));
pnlMiddle.add(txtVID);
pnlMiddle.add(new Label("Cost"));
pnlMiddle.add(txtCost);
setTextToNotEditable();
Panel pnlLeftButtons = new Panel (new GridLayout(0,2,10,10));
Panel pnlRightButtons = new Panel(new GridLayout(0,2,10,10));
pnlLeftButtons.add(btnAdd);
btnAdd.addActionListener(this);
pnlLeftButtons.add(btnEdit);
btnEdit.addActionListener(this);
pnlRightButtons.add(btnDelete);
btnDelete.addActionListener(this);
pnlRightButtons.add(btnCancel);
btnCancel.addActionListener(this);
btnCancel.setEnabled(false);
pnlMiddle.add(pnlLeftButtons);
pnlMiddle.add(pnlRightButtons);
add(pnlMiddle,"Center");
add(lblMessage, "South");
lblMessage.setForeground(Color.red);
setSize(400, 350);
setVisible(true);
else {
stop();
System.exit( -1);
public Insets insets()
return new Insets(40, 15, 15, 15);
public void loadDatabase()
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
catch(ClassNotFoundException err)
try
Class.forName("com.mx.jdbc.odbc.JdbcOdbcDriver");
catch(ClassNotFoundException error)
lblMessage.setText("Drivers did not load properly");
try
conEmployees = DriverManager.getConnection("jdbc:odbc:AutoDatabase");
cmdEmployees = conEmployees.createStatement();
rsEmployees = cmdEmployees.executeQuery("Select * from Vehicle;");
loadNames(rsEmployees);
blnSuccessfulOpen = true;
catch(SQLException error)
lblMessage.setText("Error: " + error.toString());
public void loadNames(ResultSet rsEmployees)
try
while(rsEmployees.next())
lstVehicle.add(rsEmployees.getString("InventoryID"));
catch(SQLException error)
lblMessage.setText("Error in Display Record." + "Error: " + error.toString());
public void itemStateChanged(ItemEvent event)
String strInventoryID = lstVehicle.getSelectedItem();
lblMessage.setText("");
try
rsEmployees = cmdEmployees.executeQuery(
"Select * from Vehicle where [InventoryID] ='" + strInventoryID + "';");
txtInvID.setText(strInventoryID);
displayRecord(rsEmployees);
setTextToEditable();
catch(SQLException error)
lblMessage.setText("Error in result set." + "Error: " + error.toString());
public void displayRecord(ResultSet rsEmployees)
String strFormat;
float fltCost;
try
if(rsEmployees.next())
txtInvID.setText(rsEmployees.getString("InventoryID"));
txtMan.setText(rsEmployees.getString("Manufacturer"));
txtModName.setText(rsEmployees.getString("ModelName"));
txtYear.setText(rsEmployees.getString("Year"));
txtVID.setText(rsEmployees.getString("VehicleID"));
NumberFormat fmtCurrency = NumberFormat.getCurrencyInstance();
NumberFormat fmtDecimal = NumberFormat.getInstance();
fltCost = Float.valueOf(rsEmployees.getString("CostValue")).floatValue();
strFormat = fmtCurrency.format(fltCost);
txtCost.setText(strFormat);
lblMessage.setText("");
catch (SQLException error)
lblMessage.setText("Error: " + error.toString());
public void actionPerformed(ActionEvent event)
Object objSource = event.getSource();
if(objSource == btnAdd && event.getActionCommand()=="Add")
Add();
else if(objSource == btnAdd)
Save();
else if (objSource == btnEdit)
Edit();
else if(objSource == btnDelete)
Delete();
else if(objSource == btnCancel)
Cancel();
public void setTextToNotEditable()
txtInvID.setEditable(false);
txtMan.setEditable(false);
txtModName.setEditable(false);
txtYear.setEditable(false);
txtVID.setEditable(false);
txtCost.setEditable(false);
public void setTextToEditable()
txtInvID.setEditable(true);
txtMan.setEditable(true);
txtModName.setEditable(true);
txtYear.setEditable(true);
txtVID.setEditable(true);
txtCost.setEditable(true);
public void clearTextFields()
txtInvID.setText("");
txtMan.setText("");
txtModName.setText("");
txtYear.setText("");
txtVID.setText("");
txtCost.setText("");
public void Add()
lblMessage.setText(" ");
setTextToEditable();
clearTextFields();
txtInvID.requestFocus();
btnAdd.setLabel("OK");
btnCancel.setEnabled(true);
btnDelete.setEnabled(false);
btnEdit.setEnabled(false);
public void Save()
if (txtInvID.getText().length() == 0 || txtModName.getText().length() == 0)
lblMessage.setText("The Inventory ID or Model Name is blank");
else
try
cmdEmployees.executeUpdate("Insert Into Vehicle"
+ "([InventoryID], [Manufacturer], [ModelName], [Year], [VehicleID], [CostValue])"
+ "Values('"
+ txtInvID.getText() + "', '"
+ txtMan.getText() + "', '"
+ txtModName.getText() + "', '"
+ txtYear.getText() + "', '"
+ txtVID.getText() + "', '"
+ txtCost.getText() + "')");
lstVehicle.add(txtInvID.getText());
Cancel();
catch(SQLException error)
lblMessage.setText("Error: " + error.toString());
public void Edit()
int intIndex = lstVehicle.getSelectedIndex();
if(intIndex == 0 )
lblMessage.setText("Please select the record to change");
else
String strInventoryID = lstVehicle.getSelectedItem();
try
cmdEmployees.executeUpdate("Update Vehicle "
+ "Set [InventoryID] = '" + txtInvID.getText() + "', "
+ "[Manufacturer] = '" + txtMan.getText() + "', "
+ "[ModelName] = '" + txtModName.getText() + "', "
+ "[Year] = '" + txtYear.getText() + "', "
+ "[VehicleID] = '" + txtVID.getText() + "', "
+ "[CostValue] = '" + txtCost.getText() + "' "
+ "Where [InventoryID]= '" + strInventoryID + "';");
if(!strInventoryID.equals(txtInvID.getText()))
lstVehicle.remove(intIndex);
lstVehicle.add(txtInvID.getText());
catch(SQLException error)
lblMessage.setText("Error during Edit. " + "Error: " + error.toString());
public void Delete()
int intIndex = lstVehicle.getSelectedIndex();
String strInventoryID = lstVehicle.getSelectedItem();
if(intIndex == 0)
lblMessage.setText("Please select the record to be deleted");
else
try
cmdEmployees.executeUpdate(
"Delete from Vehicle where [InventoryID] = '" + strInventoryID + "';");
clearTextFields();
lstVehicle.remove(intIndex);
lblMessage.setText("Record deleted");
catch(SQLException error)
lblMessage.setText("Error during Delete." + "Error: " + error.toString());
public void Cancel()
btnDelete.setEnabled(true);
btnEdit.setEnabled(true);
btnCancel.setEnabled(false);
btnAdd.setLabel("Add");
clearTextFields();
lblMessage.setText("");
lstVehicle.select(0);
public void stop()
try
if(conEmployees != null)
conEmployees.close();
catch(SQLException error)
lblMessage.setText("Unable to disconnect");
</code>

1) Applets that run in web browsers used to be "hip" in at one point in the dark 1990's. That time is forever gone and good riddance. Today big enterprise applications and sophisticated special purpose desktop applications are the Right Way™ to go with Java.
If you want action in your browser, look into Macromedia's Flash technology.
If you want to deploy your application easily in an applet-like fashion (one click from a browser), look into Java Webstart.
Demos: http://java.sun.com/products/javawebstart/demos.html
Documentation: http://java.sun.com/products/javawebstart/developers.html
2) It's a trivial task to write a launcher applet for any given application so that the applet starts the application in a new window. The security restrictions imposed on applets ("sandbox") might make it impossible to use the application; for instance you cannot write or read files on the local hard drive or make network connections to other servers than where the applet was loaded from. You cannot call System.exit to quit the virtual machine.
At its simplest the lancher applet code would look ilke:public class Launcher extends java.applet.Applet {
public void start() {
YourApplicatioMainClass.main(null);
}and in the html you would write:<applet code="Launcher" height="1" width="1">
</applet>See the "Writing applets" tutorial for further information http://java.sun.com/docs/books/tutorial/applet/index.html

I cannot get autocomplete to work on Firefox

I cannot get autocomplete to work when signing onto to my gmail account. I have checked the computer settings and everything is in order. Is there something I need to do with FFox settings?
Thanks,
john

Is that autocomplete to save the name and password or autocomplete to only save the name (email address)?
*https://support.mozilla.com/kb/make-firefox-remember-usernames-and-passwords
*https://support.mozilla.com/kb/Form+autocomplete
*Tools > Options > Security: Passwords: "Remember passwords for sites"
*Tools > Options > Privacy > History: "Remember search and form history"

How do you get html5 to work with Firefox?

I have disabled and removed adobe flash player. I go to youtube, enable the html5 trial version, and try to view videos and it won't work. If I enable flash, the videos work fine. I can get html5 to work in Chrome, but it will not work in Firefox. Why?

It is starting to sound like Google is being a dick and gearing their service to be fully functional with their browser and not others, unless it is the fault of Firefox. Because every video works in Chrome with html5.
Flash is being annoying. Frequently, it will freeze Firefox, and then I will get an error message saying that the flash player stopped working. I almost always get this freeze on startup of the browser (if I forgot to disable Flash) and then I get other times while using Firefox as well. I only get this problem when flash is enabled, therefore it is flash. You can argue that it is only my computer, which maybe it is, but I cannot find a solution, nor have I been able to solve it, except by disabling flash.

Why can't I get Imikimi to work on firefox?

Why won't Imikimi work with firefox? It works with IE but is very slow.

There has been a change in where Firefox searches for plugins and the plugins folder in the Firefox program folder is no longer scanned for plugins, so Firefox won't find them anymore if they are installed in the plugins folder instead of the "browser\plugins" folder that Firefox now scans.
You can set the plugins.load_appdir_plugins pref to true on the about:config page to make Firefox scan the "<install>/plugins/" directory for plugins like the WMP plugin (np-mswmp.dll).
You can alternatively move plugins from "<install directory>\plugins\" to "<install directory>\browser\plugins\" (create this folder when missing) to make Firefox find them again.
*http://www.ghacks.net/2013/05/15/why-you-may-have-lost-access-to-plugins-or-extensions-in-firefox-21/
*http://mike.kaply.com/2013/04/24/major-changes-coming-in-firefox-21/
*https://support.mozilla.org/kb/windows-media-or-other-plugins-stopped-working

Can't get sound to work on Firefox, but it works with Explorer.

I have a PC with window vista. I recently did a repair on vista because of malware. All normal except now I can't get the sound to work when I use Mozilla Firefox as browser. The sound works when I use explorer as browser. I have checked all connections & sound settings that I know. Help.

Facebook needs Flash to upload photos for drag and drop method.
Please check if all your plugins are up-to-date. To do this, go to the [http://mozilla.com/plugincheck Mozilla Plugin Check site].
Once you're there, the site will check if all your plugins have the latest versions.
If you see plugins in the list that have a yellow ''Update'' button or a red ''Update now'' button, please update these immediately.
To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.

Java Applets not working with Firefox 5 properly

Java Applets work sometime. But after sometime the Java icon at the bottom (near date & time) disappears. After this no matter what I do it does not work. Java Applets are used in this case to draw charts. The same charts come out properly in Internet Explorer. But I prefer using Firefox for its speed. What is the reason for this problem ?

-> Tap ALT key or press F10 to show the Menu Bar
-> go to Help Menu -> select "Restart with Add-ons Disabled"
Firefox will close then it will open up with just basic Firefox. Now do this:
-> Update ALL your Firefox Plug-ins https://www.mozilla.com/en-US/plugincheck/
-> go to View Menu -> Toolbars -> unselect All Unwanted toolbars
-> go to Tools Menu -> Options -> Content -> place Checkmarks on:
1) Block Pop-up windows 2) Load images automatically 3) Enable JavaScript
-> go to Tools Menu -> Options -> Privacy -> History section -> ''Firefox will: '''select "Remember History"'''''
-> go to Tools Menu -> Options -> Security -> place Checkmarks on:
1) Warn me when sites try to install add-ons 2) Block reported attack sites 3) Block reported web forgeries 4) Remember Passwords for sites
-> Click OK on Options window
-> click the Favicon (small drop down menu icon) on Firefox SearchBar (its position is on the Right side of the Address Bar) -> click "Manage Search Engines" -> select all Unwanted Search Engines and click Remove -> click OK
-> go to Tools Menu -> Add-ons -> Extensions section -> REMOVE All Unwanted/Suspicious Extensions (Add-ons) -> Restart Firefox
You can enable your Known & Trustworthy Add-ons later. Check and tell if its working.

Can't get flash to work in firefox

On I. E. the flash movie works fine but when it is tried in firefox it doesn't appear. A right click of the mouse shows that the flash is there but it doesn't work. Is there something that has to be added or removed in order to make this work properly in firefox? Going to other sites and the flash works fine except when it comes to my site? There is a possibility that it is my coding but it was cut and paste from adobe. The rationale is that firefox should be able to handle this code but it doesn't? Any ideas?

Not meaning to give you mis-information. Am struggling to overcome this problem and have been able to get the firefox to host the embedded swf.
What has happened is that the web page has been recreated specifically for firefox. Being under the impression that if the embed was done on I. E. then it would tranfer to firefox automatically. This doesn't seem to be the case. In a workaround it was decided that re-doing the page would be the best way to go.
Your assistance has been and is very beneficial in that you made me aware of the publish aspect in flash. Imagine Homer Simpson giving his "D'oh!"
Not sure if what is being done is right but it works. Am able to send it to the server, able to see it working as needed and am now looking at reading the browser to send the right page.
Were it not for your information then there would be a whole lot of struggling left to do. Let me know if this is the right track, please.
Thank you!

Getting applets to work in Firefox or IE7!!

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