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("This web site is protected by Local and International copyright laws.");
        return false;
    }
    return true;
}

function key(k) {
    if (isie) {
        if (event.keyCode == 17 || event.keyCode == 18 || event.keyCode == 93) {
            alert("This web site is protected by Local and International copyright laws.")
            return false;
        }
    }

    if (isnn) {
        alert("This web site is protected by Local and International copyright laws.")
        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;