How can i disable the ctrl + a using javascript?

Question

<script type="text/javascript">

function mischandler(){
return false;
}

function mousehandler(e){
var myevent = (isNS) ? e : event;
var eventbutton = (isNS) ? myevent.which : myevent.button;
if((eventbutton==2)||(eventbutton==3)) return false;
}
document.oncontextmenu = mischandler;
document.onmousedown = mousehandler;
document.onmouseup = mousehandler;
var isCtrl = false;
    document.onkeyup=function(e)
    {
    if(e.which == 17)
    isCtrl=false;
    }

    document.onkeydown=function(e)
    {
    if(e.which == 17)
    isCtrl=true;
    if((e.which == 85) || (e.which == 67) && isCtrl == true)
    {
    // alert(‘Keyboard shortcuts are cool!’);
    return false;
    }
    }

</script>

Hi all , I using the code to disable the right click and also the ctrl+c and ctrl+u how to disable the ctrl a in the following code. Any help would be great.

Thanks, vicky

That is some nice old code since Netscape has not been relevant in years. — epascarello, Apr 29 '13 at 14:00
Please, _never_ try to stop users from doing what they are used to, it will only annoy them and make them stop using your site — epoch, Apr 29 '13 at 14:03
you're definitely not the first one to try this either, there are a million people who already have working implementations available (like 10 seconds of googling informed me : ) http://www.arraystudio.com/as-workshop/disable-ctrl-n-and-other-ctrl-key-combinations-in-javascript.html — Timothy Groote, Apr 29 '13 at 14:04
if you're looking for a great key-binding library, I suggest https://github.com/jeresig/jquery.hotkeys it's very nice ;) — Phil, Apr 29 '13 at 14:08
You're supporting Netscape? Are you sending this website back to the 90s? — MMM, Apr 29 '13 at 14:10
If its text you don't want to be able to select, may I suggest CSS. http://stackoverflow.com/questions/826782/css-rule-to-disable-text-selection-highlighting — CharliePrynn, Apr 29 '13 at 14:11

score 14 · Answer 1 · edited May 03 '13 at 13:14

14

You shouldn't try to do this, let me tell you why. I'm assuming you want to disable ctrl + c because you don't want the user to be able to copy content from your site, well have you thought about the fact that there are a dozen of other ways to copy your content?

Download html file and copy in their favorite text editor
Inspect element and copy content from there
Use mouse to right click -> copy

And for my good friend @glenatron:

Network sniffer like Fiddler between the browser and the network card
Screenshots, Taking a photograph of the monitor

... The list goes on and on.

Also, trying to stop users from normal functionality will only bother and annoy them; most likely causing them to leave your site and never return.

edited May 03 '13 at 13:14

Alex

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answered Apr 29 '13 at 14:03

What have you tried

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Network sniffer like Fiddler between the browser and the network card, Screenshots, Taking a photograph of the monitor... – glenatron Apr 29 '13 at 14:05
@glenatron Should I add? :p The list could go on for days and days – What have you tried Apr 29 '13 at 14:06

score 5 · Accepted Answer · answered Apr 29 '13 at 14:16

FInd the below code for detect ctrl + a,ctrl + A,ctrl + c,ctrl + C, ctrl + u,ctrl + U with your code editing.

<script type="text/javascript">
var isNS = (navigator.appName == "Netscape") ? 1 : 0;

if(navigator.appName == "Netscape") document.captureEvents(Event.MOUSEDOWN||Event.MOUSEUP);

function mischandler(){
return false;
}

function mousehandler(e){
var myevent = (isNS) ? e : event;
var eventbutton = (isNS) ? myevent.which : myevent.button;
if((eventbutton==2)||(eventbutton==3)) return false;
}
document.oncontextmenu = mischandler;
document.onmousedown = mousehandler;
document.onmouseup = mousehandler;
var isCtrl = false;
document.onkeyup=function(e)
{
if(e.which == 17)
isCtrl=false;
}

document.onkeydown=function(e)
{
if(e.which == 17)
isCtrl=true;
if(((e.which == 85) || (e.which == 117) || (e.which == 65) || (e.which == 97) || (e.which == 67) || (e.which == 99)) && isCtrl == true)
{
// alert(‘Keyboard shortcuts are cool!’);
return false;
}
}

you can get value for key from below link

http://help.adobe.com/en_US/AS2LCR/Flash_10.0/help.html?content=00000520.html Enjoy...!! :)

How can i disable the ctrl + a using javascript?

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