js實現禁止右鍵 禁止f12 檢視原始碼

document.oncontextmenu = function () { return false; };
        document.onkeydown = function () {
            if (window.event && window.event.keyCode == 123) {
                event.keyCode = 0;
                event.returnValue = false;
                return false;
            }
        };