document.onmousedown = checkClick
if (document.layers){
        document.captureEvents(Event.MOUSEDOWN)
}
function checkClick(ev) {
        if (navigator.appName == "Netscape"){
                if (ev.which != 1) {
                        alert("© Copyright 2003, BDI Productions")   // You can delete this line if you want
                        return false
                }       
        }
        else{
                if (event.button != 1){
                       alert("© Copyright 2003, BDI Productions")   // You can delete this line if you want
                        return false
        }
}}