function disable_right_click(e) {
    var browser = navigator.appName.substring ( 0, 9 );
    var event_number = 0;
    if (browser=="Microsoft")
        event_number = event.button;
    else if (browser=="Netscape")
        event_number = e.which;

    if ( event_number==2 || event_number==3 )
        {
        alert ("Please do not use our code or images, they are copyright (see terms and conditions at the bottom of the page)!");
        return (false);
        }

    return (true);
}

function check_mousekey () {
    var mouse_key = 93;
    var keycode = event.keyCode;

    if ( keycode == mouse_key )
    { 
        alert ( "Please do not use our code or images, they are copyright (see terms and conditions at the bottom of the page)!" );
        //return false;
    }
}

function trap_page_mouse_key_events () {
    var browser = navigator.appName.substring ( 0, 9 );

    document.onmousedown = disable_right_click;

    if ( browser == "Microsoft" )
        document.onkeydown = check_mousekey;
    else if ( browser == "Netscape" )
        document.captureEvents( Event.MOUSEDOWN );
}

window.onload = trap_page_mouse_key_events;