document.oncopy = function () {
    return false;
};
document.onmousedown = function (e) {
    if (e.which == 2) {
        return false;
    }
    if (e.which == 3) {
        return false;
    }
};
document.onkeydown = function () {
    if (event.ctrlKey && event.keyCode == 86) {
        return true;
    } else if (event.ctrlKey) {
        return false;
    }
    if (event.altKey) {
        return false;
    }
    if (event.shiftKey) {
        return false;
    }
    if (event.keyCode == 123) {
        return false;
    } else if ((event.ctrlKey) && (event.shiftKey) && (event.keyCode == 73)) {
        return false;
    } else if ((event.shiftKey) && (event.keyCode == 121)) {
        return false;
    }
};
document.onselectstart = function () {
    return false;
};