var message = "";

function clickIE4() {
    if (event.button == 2) {
        //alert(message);
        return false;
    }
}
function clickNS4(e) {
    if (document.layers || document.getElementById &&!document.all) {
        if (e.which == 2 || e.which == 3) {
            //alert(message);
            return false;
        }
    }
}
if (document.layers) {
    document.captureEvents(Event.MOUSEDOWN);
    document.onmousedown = clickNS4;
}
else if (document.all &&!document.getElementById) {
    document.onmousedown = clickIE4;
}
//document.oncontextmenu = new Function("alert(message);return false")
document.oncontextmenu = new Function("return false")