Disable Browser Shortcut Keys
===

I am trying to create, essentially, a 'kiosk'

I have an web application that I want to be the only thing accessible on screen.  I know chrome has a 'kiosk' mode (shortcut: chrome.exe --kiosk www.url.com).  That takes care of the auto-fullscreen, but disables very few shortcuts (perhaps only f11).

With a bit of help from the internet, I wrote out some javascript that gets *most* of the job done.  The code is as follows: 

    window.onload = function() {
    	window.document.body.onkeydown = function() {
    		if (event.ctrlKey) {
    			event.stopPropagation();
    			event.preventDefault();
    			try {
    				event.keyCode = 0; // this is a hack to capture ctrl+f ctrl+p etc
    			}
    			catch (event) {
    
    			}
    			return false;
    		}
    		return true; // for keys that weren't shortcuts (e.g. no ctrl) then the event is bubbled
    	}
    }

This takes care of things like ctrl+f, ctrl+p, etc.  Unfortunately, it does *not* disable shortcuts such at ctrl+t, ctrl+n, f5, etc.

Is it even possible to disable these, or am I chasing a rainbow here?  I don't care if it's javascript, settings, whatever, but I would really like to do it *without* a plugin.