Question

Disabling ALT-F4

Asked by: jarasa

Hi all.
Does anybody know a way to disable ALT-F4 key that really works without making any change to the current document or opening a new window, my code works and it disable the key but I have to display an alert and open a new window or it closes the main one. Besides if I push ALT-F4 again while the alert is open it closes the main window too, I would like to do it without making any of this things.

Tahnks in advantage

Javier

P.D.: Here is how I do it.

document.onkeydown=teclas;  

function teclas() {  

var tecla = window.event.keyCode;
var control = window.event.ctrlKey;
var alt = window.event.altKey;
var tipo=event.srcElement.type;

if (alt) {
      switch (tecla) {
            // Alt-F4
            case 115:
                  window.event.keyCode=86;  
                  window.cancelEvent=true;
                  event.cancelBubble=true;
                  event.returnValue=false;
                  event.cancel=true;
                  adios();
                  return false;  
                  break;
      }
}
}

function adios() {
             // I have to display this alert first
      alert("VEGA :: Opcion no Valida")
             // And open this window too or it wont work
      openCerrar("cerrar.jsp",400,250,null,null,'')
}

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2004-01-27 at 00:55:45ID20863954
Tags

disable

,

alt

Topic

JavaScript

Participating Experts
2
Points
500
Comments
14

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

  1. disable close window alert
    I can disable the close window alert using "window.opener=null;window.close();return false;" (thanks to knightEknight) It works great on IE6.0 on my PC at work. Unfortunately, it doesn't work on my test home PC using IE5.0. I don't have another PC with 5.0, so I ...
  2. Disable messagebox alert sound
    Hi All, i have Visua C# application, and wondering if Is there is a way that i can disable messagebox alert sound when its displayed? Thanks

Free Tech Articles

  1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
    It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
  2. SCCM OSD Basic troubleshooting
    SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
  3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
    This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
  4. Create a Win7 Gadget
    This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
  5. Outlook continually prompting for username and password
    There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
  6. Backup Exchange 2010 Information Store using Windows Backup
    There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

Cloud Class Webinars

  1. Avoiding Bugs in Microsoft Access
    Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
  2. Top 10 Best New Features in Visio 2010
    Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
  3. IT Consultant Business Secrets Revealed
    Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
  4. Disaster Recovery and Business Continuity
    Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
  5. Organize Your Visio Diagrams with Containers and Lists
    Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
  6. How to Us Objects, Properties, Events and Methods in Microsoft Access
    Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

Join the Community

Give a Little. Get a Lot.

Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

Join the Community

Answers

 

by: ZvonkoPosted on 2004-01-27 at 01:17:34ID: 10207854

Are you a XXX webadmin?

 

by: jarasaPosted on 2004-01-27 at 01:26:00ID: 10207870


NO, Why?

To tell you the truth I don't even know what you mean with XXX webadmin

:c)

Javier

 

by: ZvonkoPosted on 2004-01-27 at 01:32:06ID: 10207877

It means pink pages.

And it can be true that you do not serve such pages, but other readers here could use such anoing things, like you ask for, for anyting they want.


 

by: jarasaPosted on 2004-01-27 at 01:45:21ID: 10207923

OK I see.

Well I'm doing an Intranet application that I want it to work as a client server one and I want to disable user from closing the application without pushing the "Exit" button wich make some validations and invlidates the sesion on the server, the way I told you works but I prefer not to show any message to the client, I do control all the keybord keys, and don let anyone to take any part of the information from the window, I don't know if is wrong or not to do this but if you know the way and don't want to show it here you could sent it to my by mail at ramos_j1@tsm.es, I will appreciate it a lot I've been figuring it out for more than a week and my time cost a lot to my user.

:c)

Javier

 

by: jarasaPosted on 2004-01-27 at 01:49:52ID: 10207942

I think I could ask EE Administrator to delete the code part I put on the message too.

 

by: ZvonkoPosted on 2004-01-27 at 01:59:20ID: 10207973

For that situations is better to maintain page state and evaluate the state in unload event.
Did you test with body attributes:
<body onLoad="initState()" onUnload="checkState()">

In checkState() function you can notify your server side about session termination, for example in a popup window wich ends with self.close().



 

by: jarasaPosted on 2004-01-27 at 02:08:14ID: 10208008

I know that I can call the fucntion to disble session on the unload of the document but beside that I don't want the user to close the window with ALT-F4 I have a window made out of 8 frames to simulate a client disign window in 7 of the 8 frames I have no code so if the focus is at one of those I' will have to control to many things, actually I have it done and working with that code but it the user pushes ALT-F4 on the alert it closes the main window. Of course the user can press Ctrl-Alt-Del and kill the task but well I don't know if they'll go that far.

I don't mind deleting the question if nobody is going to answer it.  But Zvonk, I know what I want to do!!

Thanks anyway for the replays.

Javier

 

by: devicPosted on 2004-01-27 at 03:25:32ID: 10208283

<script>
document.onkeydown = function(){
if(!window.event)return
if(window.event.keyCode == 18 || window.event.keyCode == 115)
      {
            alert(":)");
            event.returnvalue=false;
      }
}
</script>

 

by: ZvonkoPosted on 2004-01-27 at 03:32:54ID: 10208320

Third strike beats it :)

But well done.

 

by: jarasaPosted on 2004-01-27 at 03:36:45ID: 10208335

Thanks devic, but that does not work either as I'm trying. besides that I'd like to display no messages at all if you keep ALT key pressed and push twice F4 key it closes the window.

I'm not really sure if it is possible but I think it is or at least I remember I got a page once on the internet that I only coulded close killing the task.

Javier

 

by: jarasaPosted on 2004-01-27 at 04:02:42ID: 10208463

Zvonko.

Is it possible or not?

At least you can save me headaches!!

Javier

 

by: ZvonkoPosted on 2004-01-27 at 05:02:03ID: 10208936

I have investigated on the net for other people solutions.
As far as I can see nobody provides a solution for disabling ALT+F4

From my point of view is recreation of your frameset the best solution to simulate application behaviour.

Good luck,
Zvonko

 

by: devicPosted on 2004-01-27 at 05:05:39ID: 10208964

here another solution with onbeforeunload event:

===============
<html>
<head>
      <title>Untitled</title>
      <META http-equiv="Content-Type" content="text/html; charset=windows-1251">
</head>

<body onbeforeunload="DoOnBeforeUnload()" bgcolor=ffffff >
<script>
var skipCancelClose=false
function DoOnBeforeUnload() {
 if(!skipCancelClose){
   event.returnValue= "Leaving this page will cause you to lose your connection to the Server!";
 }
}

function runit()
{
      document.getElementById("skipCancelCloseValue").value="skipCancelClose=" + skipCancelClose
}
setInterval("runit()",100)

document.onmouseover=function(){skipCancelClose=true}
document.onmouseout=function(){skipCancelClose=false}

</script>
<a href=http://www.google.com class=text>www.google.com</a>
<br><br><br>
<center><input id=skipCancelCloseValue></center>
</body>
</html>

 

by: jarasaPosted on 2004-01-27 at 06:28:52ID: 10209546

Well Thanks Zvonko, I was begining to think that you knew the solution but weren't going to tell me, I've been searching the net for more than a week and my code is the most i've been able to figure out, I know it has to be a way but....

Devic, thanks for you effort either, I like that solution but I don't think I'll be able to implement it, onbeforeunload event is fired anytime you change a page and I have 200 JSP on my application, the message will appear everytime I change from one part of the application to another becose I close all windows and open a new one when the user change from one part of it to another.

Well guys I'll slit the points on between you, I guess is the best thing I can do, but if you get to it please let me know it, OK.

Thanks again for the effort.

Javier

20120131-EE-VQP-002

3 Ways to Join

30-Day Free Trial

The Experts

98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

The Experts

97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

Testimonials

"...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

Testimonials

"I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

Testimonials

"WOW! You guys have great, active, and knowledgeable people on here." moore50

Business Clients

Business Clients

In the Press

"If you’ve got a question... Experts Exchange can supply an answer.”

In the Press

"...an invaluable aid for both IT professionals and those who require tech support."

In the Press

"where IT professionals provide quick answers on just about any topic"

Business Account Plans

Loading Advertisement...