HTML View Source Protect

sakthi · by sakthi on Wed Mar 19, 2008 5:15 pm

View Source protect can be done in two ways

1. <body oncontextmenu='return false;'> - just disables the right click on the browser

2. Many a times there is a situation where an organization wants no one to right click, copy and paste the page, print or view source etc. To achieve this one should deactivate the mouse right button and the keyboard right click button.
But the same thing can be achieved with the help of the menu bar. We have to deactivate Alt key to restrict the user from accessing menu items.

After doing this there is one more possibility from where the user can directly take the stuff from the page. Just use Ctrl + A to select the whole page and directly Ctrl + C, Ctrl + V to copy and paste respectively. This option must also be disabled.

One more issue to take care is browser compatibility. It should work in Microsoft Internet Explorer and in Netscape Navigator.

Here's the code:

var isnn,isie
if(navigator.appName=='Microsoft Internet Explorer') //check the browser
{ isie=true }

if(navigator.appName=='Netscape')
{ isnn=true }

function right(e) //to trap right click button
{
if (isnn && (e.which == 3 || e.which == 2 ))
return false;
else if (isie && (event.button == 2 || event.button == 3))
{
alert("Sorry, you do not have permission to right click on this page.");
return false;
}
return true;
}

function key(k)
{
if(isie) {
if(event.keyCode==17 || event.keyCode==18 || event.keyCode==93) {
alert("Sorry, you do not have permission to press this key.")
return false;
}
}

if(isnn){
alert("Sorry, you do not have permission to press this key.")
return false; }
}

if (document.layers) window.captureEvents(Event.KEYPRESS);
if (document.layers) window.captureEvents(Event.MOUSEDOWN);
if (document.layers) window.captureEvents(Event.MOUSEUP);
document.onkeydown=key;
document.onmousedown=right;
document.onmouseup=right;
window.document.layers=right;

Put this code in a file called security.js and reference it between the <HEAD> and </HEAD> tags of any html or asp page using: <Script language="JavaScript" src="security.js"></script>

NOTE: Application works best when a new window is opened with menubar disabled.

Regards
Sakthi