How to ignore Control+C (copy) on web browser

I'm trying to ignore Ctrl-C in my website but im stuck.

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
        <title>Untitled Document</title>
        <script language="javascript">
            function whichButton(event)
            {
                if (event.button==2)//RIGHT CLICK
                {
                    alert("Not Allow Right Click!");
                }

            }
            function noCTRL(e)
            {
                var code = (document.all) ? event.keyCode:e.which;

                var msg = "Sorry, this functionality is disabled.";
                if (parseInt(code)==17) //CTRL
                {
                    alert(msg);
                    window.event.returnValue = false;
                }
            }
        </script>
    </head>
    <body>
        <form method="">
            <strong>Not Allow Paste </strong><BR>
            <input type="text" value="" onMouseDown="whichButton(event)" onKeyDown="return noCTRL(event)"/>
        </form>
    </body>
</html>

I tried this code, but it is can only ignore right click.

How can I ignore Ctrl-C?

if your body tag adds these events

<body oncontextmenu="return noMenu();" onkeydown="return noKeys(event);">

and you then define these functions in your <head> section, you can take action when the context menu is activated (right click) or when keys are pressed on your page.

<script type="text/javascript">
function noMenu()
{
    alert("Not Allow Right Click!");
    return false;
}

function noKeys(event)
{
    if (event == null) event = window.event;
    // here you can check event.keyCode
    return false;
}
</script>

harry

Have a look at this website

But if someone wants to copy your content, they can. It will just make it harder and more time consuming to use.

And also

Regarding this Ctrl-C you could add javascript to block it, but it is useless, since the user can always disable javascript. In fact many users will find interception of right-click very annoying.

All these could have a meaning if you are building an intranet application or you can ship an integrated browser for users to view the application. With public html, I believe it isn't even worth trying. One solution would be to build your application with flash or another plug-in. This way you can encrypt everything you've sent to the client.

来源：https://stackoverflow.com/questions/9955178/how-to-ignore-controlc-copy-on-web-browser

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