CIS 119 Disable context menu

Code

Try to right click in this window.

if (typeof document.oncontextmenu == "object") {
    if (document.all) document.onmousedown = captureMouseDown;  // IE
    else document.oncontextmenu = captureMouseDown;  // Safari
} else {
    window.oncontextmenu = captureMouseDown;  // FF
}

function captureMouseDown(evt) {
    var mouseClick;
    if (evt) mouseClick = evt.which;
    else mouseClick = window.event.button;
    if (mouseClick >= 1 && mouseClick <=3) {
        alert('Context menu disabled');
        return false;
    }
}