function clickIE4(e) {
    var e = e || window.event;
    if (e.button && e.button == "2") {
        return false;
    }
}

function clickNS4(e) {
    var e = e || window.event;
    if (document.layers || document.getElementById && !document.all) {
        if (e.which == 2 || e.which == 3) {
            return false;
        }
    }
}

function OnDeny() {
    if (event.ctrlKey || event.keyCode == 78 && event.ctrlKey || event.altKey || event.altKey && event.keyCode == 115) {
        return false;
    }
}

try {
    if (document.layers) {
        document.captureEvents(Event.MOUSEDOWN);
        document.onmousedown = clickNS4;
        document.onkeydown = OnDeny();
    } else if (document.all && !document.getElementById) {
        document.onmousedown = clickIE4;
        document.onkeydown = OnDeny();
    }
} catch (e) { }

try {
    document.oncontextmenu = function () {
        return false;
    };
} catch (e) {}

try {
    document.body.onselectstart = function () {
        return false;
    }
} catch (e) {}

try {
    document.body.oncopy = function () {
        return false;
    }
} catch (e) {}